A history of Latin America Essay Example for Free

A history of Latin America Essay It was during the European colonial expansion that Brazil fell under Portugal as a colony. Colonization in Brazil spanned the period between 1500 to year 1815. Portugal was interested in Brazil for a number of reasons that included the hope of getting minerals, raw materials as well as slave trade and labor to among other interests. The colonization of Brazil had some effect on the native way of life, with most of these effects having had a lasting effect to date. It’s worth noting that from the history of Brazil, France also had an interest in Brazil but could not stand up to Portugal which had taken the control of this part of the world through the signing of a treaty. The Portugal king known as king Manuel 1 who was reigning then wanted the colony to be ruled under a system of 15 hereditary captaincies- a fit that failed to work due to large-scale failure. The system gave way to royal enterprise in 1549. The following essay describes the causes and the effects of the Portuguese colonialism in Brazil. Causes of colonialism There are a number of things that preceded the Portuguese entry into and colonization of Brazil. Following the signing of the treaty of Tordelsillas in the year 1494 that facilitated the division of the world between Spain and Portugal, all land falling to the east was taken up by Portugal while Spain took up the land on the western side. In the year 1500, a navigator, Captain Pedro Alvares Cabral in charge of a fleet of 13 ships trailing the route taken by Vasco da Gama to India, landed in Brazil. He possessed this land for king Manuel 1 as an overseas colonial land for Portugal. His possession of the land made it a colonial land for Portugal (Sweet 2007p233). The Portuguese expressed their interest in Brazil due to the presence of raw materials that proved to be valuable for Portugal. One of the raw materials that Portugal got from Brazil includes the Brazilwood tree from which dark wood and red dye could be extracted. The Brazilwood was readily available in the Brazilian rainforest where it grew naturally. The red dye was exported to Europe where it was useful in staining luxurious textile for trading. The dark wood was sought for commercial purposes as well- specifically for sale within the European markets. The Portugal colonial system was also interested in growing sugar cane from Brazil for use in making of wine and for exporting to Portugal. An interest in other agricultural products of the nature of cash crops also interested the Portugal royal government that was reigning under the king Manuel 1 to take up Brazil as a colony. The cash crops drawn from Brazil included cotton and tobacco. These two cash crops were exported to Europe for sale in the European market. Portugal was interested in Brazil due to the prospect of getting slaves for labor and trade. The plantations in Europe required free labor that slaves could provide. Portugal marked Brazil as a potential area where for getting slaves for their plantations in Europe or for trading them. Even though the Portugal authorities had managed to transact some of the slaves with a Brazilian origin, the coming of the Jesuits in Brazil greatly led to the fall of the trade since they were opposed to the trade. This forced the Portugal authorities to embark on importing slaves from West Africa. At the same time, labor was greatly needed in the sugar plantations in Brazil. The natives provided this labor in exchange of scissors, axes, mirrors and knives while some were captured and forced to provide the labor as slaves (Morris 2006p34). Another reason why Portuguese had an interest in Brazil was because they were hoping to get minerals that they could use for their industries in Portugal or sell them in the European market. Though initially no minerals were found, some deposits of gold and later diamonds were found in the 18th century in the interior of Brazil by the bandeirantes. The area where gold deposits were found is known as the Minas Gerais mines. Deposits of diamond were found in 1729 in a village known as the Tujico village- the present day Diamantina. The French had expressed an interest n the land of Brazil as it was attracted to the Brazilwood and the prospect of mining some minerals from the land. This forced Portuguese to take up the land for establishing colonial rule in it before the French powers could take it over. Even though Portuguese had already possessed the land of Brazil, the heavy presence of the French military along the cost of Brazil forced the Portuguese to set the colonial powers and use military power to evacuate the French from the Brazilian coast (Leftwich 1999p156). Effects of Portuguese colonialism in Brazil The presence of the Portuguese colonial power in Brazil affected a number of the native life of the people in Brazil. Colonialism led to the widespread and adoption of the catholic faith in worship. This was a result of the coming of the Jesuits, who were led by the first governor, Tome de Sousa. The Jesuits made a great representation of the religious enterprise, setting missions within Brazil and actively converting the natives into the catholic faith. Another consequence of the Portuguese colonial powers in Brazil is the death of a great number of people due to wars that pervaded the colony. The natives were opposed to the colonial powers and therefore staged resistances that led to the death of many natives. An example of the native revolts is the Guarani war of the year 1756 where the native were fighting the Portuguese authorities as a protest against slave trade. The native guaranis were assisted by the Jesuits who also opposed slave trade and labor (Chasteen 2001 p251). The colonial era in Brazil also played a great role in the proliferation of the people of the African origin in Brazil. Since Brazil drew a lot of slaves from the West African region to work within the plantations in Brazil, a very large number of Africans settled within the Brazilian land after the slave trade was abolished since they had no way of going back to Africa even when they were set free (Freyre 2008 p458). There was a proliferation of infectious diseases that were brought by the colonialist from Europe to Brazil. The natives had no natural immunity against these diseases and this led to the death of a great number of natives from these foreign diseases. The colonial powers also led to the embrace of the sugar cane growing in agricultural sector for export. Since sugar cane had such a high demand within the European market, the expansion of the sugar cane sector drew great profits. This sector however received a blow and fell once the Dutch and the French started cultivating and exporting sugarcane to the European market. Since Antilles- the area where Dutch and the French produced the sugar was much closer to Europe, the sugar prices fell drastically towards the end of the 17th century and the beginning of the 18th century during which time the sugar industry on Brazil fell. The colonial powers within Brazil also led to the founding of the Rio de Janeiro city in the year 1565 by the governor general Estacio de Sa’. He established Rio de Janeiro as the capital of Brazil in the year 1763 from Salvador. At the same time, a number of changes took place with the cities in Brazil. The estados – states- in Brazil had been divided and separated so that they were headed by the city council prior to the year 1763. The city councils were composed of top figures within the Brazilian land including the merchants, land owners and business men. Since Brazil was to big to be administered by the royal government, there arose a need to divide this area into smaller estates. The states of Brasil, Maranhao, and Grao-para were unified into Brazilian viceroyalty in the year 1763 and Rio de Janeiro was set as the capital of these cities. This helped to destroy the divisions that were created in the early days of the colonial invasion (Freyre 2008 p457). There was the creation of a number of towns in south Brazil. Some of the towns created include Colonia de Sacramento, Alores islands, and Porto Alegre among other towns. As essay shows, there are a number of major changes that took place with the expansion of the Portuguese power in Brazil. The native Brazilians abandoned their cultural way of life and adopted the life that the Portuguese were living in terms of dress code, food eaten, and the religion adopted (Keller 2006p517). Conclusion Expansion of the European powers into the rest of the world during the colonial era led to major changes and experiences into the areas that these countries set their colonial power. In the case of Brazil, changes that took place were experienced over the whole range of the living including their social living, political life and religion among other areas. The effect of the colonial powers is still felt in Brazil to the present day. References Chasteen J (2001) Born in blood and fire: a concise history of Latin America, Norton p251 Freyre G (2008) The masters and the slaves (Casa-grande senzala) Brazilian civilization, University of Texas p457, 458 Keller (2006) Colonization study, founding of new societies. Ginn Company p517 Leftwich A (1999) Redefining politics; populace, property, and power, Taylor Francis p156 Morris H (2006) History of Colonialism from the Earliest Times Present Day, University of Michigan p34 Sweet W (2007) A history of Latin America. The Abingdon Press p233

Network Simulation With OPNET Modeler

Network Simulation With OPNET Modeler M.KAMRAN USMANI ABSTRACT Routing protocol is the key for the quality of modern communication network. EIGRP, OSPF and RIP are the dynamic routing protocols being used in the practical networks to propagate network topology information to the neighboring routers. There have been a large number of static and dynamic routing protocols available but choice of the right protocol for routing is dependent on many parameters critical being network convergence time, scalability, memory and CPU requirements, security and bandwidth requirement etc. This Assignment uses OPNET simulation tool to analyze the performance of RIP and EIGRP commonly used in IP network. Initially We have Following Network. By Examining the Network we figure out that Red line indicating the Data Rate of 44.736 Mbps between network components and only Network connection between London Office and Portsmouth office has Data Rate of 64 Kbps. The Traffic Flow between London Office and Bristol_corporate is IP_Traffic Flow having following chracteristics      RIP Protocol Over Netwrok: Routing Information Protocol (RIP) is a distance vector dynamic routing protocol that employs the hop count as a routing metric. RIP is implemented on top of the User Datagram Protocol (UDP) as its transport protocol. It is assigned the reserved port number 520. RIP prevents routing loops by implementing a limit on the number of hops allowed in a path from the source to a destination. The maximum number of permitted hops is 15. Hence a hop count of 16 is considered an infinite distance. This hop number limits the size of networks that RIP may support. RIP selects paths that have the smallest hop counts. However, the path may be the slowest in the network. RIP is simple and efficient in small networks. First we have to run RIP routing protocol in the network for a simulation period of 600 seconds with selecting following criteria Path Selection Time Taken for routing convergence Protocol Overhead Path Selection For path selection we get following result with RIP protocol The IP traffic Flow is from London to Bristol Corporate and due to Low Data rate between London to Portsmouth path as compare to London to Oxford path the RIP protocol follows maximum the low Data rate path which is London Office to Portsmouth, and graph displays data throughput for the links London to Portsmouth and Portsmouth to Bristol. Time Taken for routing convergence RIP is distance vector routing protocols, announces its routes in an unsynchronized and unacknowledged manner. This can lead to convergence problems. The graph is showing the time taken for routing convergence of RIP. The convergence time is high 6.975 sec that’s mean routers are finding it difficult to exchange state information. Protocol Overhead RIP is a â€Å"distance vector† based protocol selects the best routing path based on a distance metric (the distance) and an interface (the vector) , RIP protocols evaluate the best path based on distance, which can be measured in terms of hops or a combination of metrics calculated to represent a distance value. In this exercise RIP selects London to Portsmouth link and maximum utilization occurs . The utilisation and convergence data suggests there is some queuing and blocking on the link. For example, the utilisation for the London to Portsmouth link is high i.e 84.629 therefore suggesting the link is suffering from over-utilisation. Queuing/Delay In the point to point queuing graph , the London to Portsmouth Link contains queuing delay on average 3.6032 sec , therefore suggesting there is traffic blocking or queuing on the link. The link between London to Portsmouth uses a DS0 (Blue) cable with a data rate of 64Kbps compared to the other links in the network that use a DS3 cable (Red) with a data rate of 44.736Mbps; therefore the combination of the over-utilisation of the London to Portsmouth link with the low data rate cable (DS0) has caused traffic queuing or blocking to occur. -Excersise -2 - EIGRP Protocol Over Netwrok: Enhanced Interior Gateway Routing Protocol (EIGRP) is a Cisco proprietary routing protocol. It is based on a new route calculation algorithm called the Diffusing Update Algorithm (DUAL). It has features of both distance vector and link state protocols. EIGRP metrics are based on reliability, MTU, delay, load, and bandwidth. Delay and bandwidth are the basic parameters for calculating metrics First we have to run EIGRP routing protocol in the network for a simulation period of 600 seconds with selecting following criteria Path Selection Time Taken for routing convergence Protocol Overhead Path Selection For path selection we get following result with EIGRP protocol The IP traffic Flow is from London to Bristol Corporate but as contrast with RIP which selected low data rate path, EIGRP select the path from London to Oxford , Oxford to Birmingham , and Birmingham to Bristol path to achieve the traffic Flow. Time Taken for routing convergence EIGRP is more efficient as compared to RIP , Graphs are showing the convergence duration very fast 0.0074427 Sec as Compared to RIP which was 6.975 Sec with same scenario. Protocol Overhead As Compared to RIP , No over utilisation occurs in EIGRP , Utilisation graphs shown above clearly that the utilisation distributed evenly over path with value for the London to Oxford is 5.5606 , Oxford to Birmingham is 5.5783 and Birmingham to Bristol is 5.5662 EIGRP performs better in terms of network convergence, routing traffic, and Ethernet delay. EIGRP has the characteristics of both distance vector and link state protocols, has improved network convergence, reduced routing protocol traffic, and less CPU and RAM utilization compared to RIP protocol. EIGRP has very low usage of network resources during normal operation since only hello packets are transmitted. When a routing table changes, its convergence time is short and it reduces bandwidth utilization -Excersise -3 - FAILURE SCENARIO We introduced a link Failure Scenario between Bristol corporate and Porstmouth Office after 100 Seconds and its recovery at 200 Seconds and run the RIP and EIGRP protocol over network. Following are our Observations with side by side comparison of RIP and EIGRP Utilization In the RIP protocol the link failure after 100 sec prevented the traffic to flow; therefore when the link recovered after 200 sec a huge amount of traffic was bottlenecked on the link causing the utilisation of the London to Portsmouth to suddenly increase. Also it can be observed that during the time of the failure the RIP protocol began to reroute the traffic over the London to Oxford, Oxford to Birmingham, and Birmingham to Bristol links before the link recovered the graph is showing this small utilization on the links. In the EIGRP Protocol, link failure event did not affect the utilisation of the EIGRP protocol because the link was not used in the routing path; The EIGRP did not use the link Portsmouth to Bristol in its path selection, so the performance of the network will be barely affected by the failure ; hence the utilisation values doesn’t change Convergence In RIP The Convergence Duration becomes much higher as compare to old scenario before Failure , it was 6.975 before and 19.409 now , this is because routers updates their routing tables when failure occurred and recovered it takes more time period , In Contrast with EIGRP protocol the Convergence Duration becomes 0.012273 , much less than RIP this is because EIGRP only update the link failure routing table not the whole network , So EIGRP provides much efficient and faster way to achieve convergence. Time Delay of Protocol More IP packets drops in RIP as compared to EIGRP because of the failure in link of the path which RIP follows , and as contrast less IP packets drops in EIGRP because it does not follow the path of failure link. -Excersise -4 - Consider the given Network merging with another network, Picture shown below the merging Network The IP Traffic flows sending traffic from London Office to three destination North-wales Plant, Birmingham Plant and Oxford Office. We defined IP Traffic according to given table. A New Link DS_1 ( Black Line in Picture ) introduced which connects North-wales Plant to London Office via The New Manchester Office. We runs RIP as routing Protocol which gives us Following observations: Utilization From Graph it is clearly showing that utilisation is high for London office to Manchester office and Manchester Office to North Wales Both are approximately 97 % utilisation which is overutilization and cause serious problems to the network. For London to oxford office and Oxford to Birmingham Plant the utilisation is nearly 13% and 6% this is because of link using high data rate cable DS3 where we get the low utilisation and low data rate comparatively where we get lower data rate cable. DS1 cable has data rate of 1.5Mbps which DS3 has 44.736 Mbps With this Observation , we come to know that one possible solution is using EIGRP protocol , as EIGRP protocol solve the over utilisation problem from our network. Lets see by running the EIGRP protocols and compare the result of it with RIP The EIGRP protocol solves the Over utilization problem we have faced in RIP protocol and the resultant graph and comparison is showing this clearly with evenly distributed utilization over selected path by EIGRP. CONCLUSIONS : It can be seen that EIGRP compared to RIP performs better in terms of network convergence activity and Routing protocol traffic. EIGRP has the characteristics of both distance vector and link state protocols, has improved network convergence, reduced routing protocol traffic, and less CPU and RAM utilization compared to RIP References: Performance Analysis of RIP, EIGRP, and OSPF using OPNET By Don Xu and Ljiljana TrajkoviĆ¡ Dynamic Routing Protocol Implementation Decision between EIGRP, OSPF and RIP Based on Technical Background Using OPNET Modeller By Thornier, S.G.

Affirmative Action :: Affirmative Action Essays

Affirmative action, is it still needed in this day and age? Has it accomplished what it was supposed to? Many people say that if America concentrated on programs that provided assistance to the most needy then they would have the opportunities that affirmative action is trying to provide. By going into the ghettos of our cities and stimulating business, thereby, promoting economic growth, the disenfranchised will reap the benefits. Have they been reaping the benefits of affirmation action? As a nation devoted to equality, the United States must do away with unproductive race-dividing policies. By eliminating them, Americans can take major steps in promoting competition and overcoming the color barrier. In his famous march in 1963, Martin Luther King Jr. longed for a society where "people would not be judged by the color of their skin but by the content of their character." Moreover, skin-color and social status should be irrelevant in hiring employees. Whereas, judging peo ple by the "content of their character" and their capabilities will create a thriving country. The emergence of Louis Farrakhan and the O.J. Simpson verdict have aroused American awareness regarding the extent to which race relations in this country have deteriorated. While Martin Luther King Jr. preached unity and equality in America, Farakahan supports segregation. Any organization or individual promoting a particular race diminishes uniformity. The existence of affirmative action and quotas further segregates American society by characterizing people by race and distinguishing between skin color. In order to bring people together, these classifications must yield. In employment situations, when the employer is bound to affirmative action policies, an individual of race A will receive a job before a better qualified individual of race B. These results are unfortunate. It’s discouraging to think that a company may not reach its greatest economic Affirmative Action 3 potential because it is forced to hire the less qualified of two individuals. How can we, as Americans, possibly promote policies that give preferential treatment to one person over another, based on something as irrelevant as the color of their skin? We can’t. Maintaining the role of one of the most competitive countries in the world, I would like to think that, as Americans, we have more pride in our country than that which is hampered by affirmative action. Furthermore, affirmative action and quotas play a very similar role in education. Unfortunately, many exceptional young students may not reap the benefits a well-respected college has to offer because someone with a possible, lesser degree of potential may be granted admission on the basis of their skin color.

Essay examples --

The mobility paradigm proposed by John Urry (2000) brought a significant shift into the way of researching in social sciences. According to BÃ ¼scher and Urry (2009: 100), this shift allows theorize the social from the perspective of economic, social and political practices, ideologies and infrastructures. These, as reported by authors (2009: 100), engage the mobility of people, things and information. However, this radical shift in theory goes hand in hand with an inevitable need of new methods to gather sociological knowledge. We can see this need on the example of cycling as a practice of mobility. As Spinney and Brown (2009: 132) stated, the dissatisfaction with such a small range of methods that could help to explain various aspects of cycling has been rising lately. Thus, how to research on this practice of mobility to gain as much sociological knowledge as possible? The answer might be hidden within developing methodologies of sociology with emphasis on visual and sensory app roach. In this essay I will demonstrate how might be cycling investigated with the assistance of new methods that include video. Firstly, the mobility paradigm will be briefly introduced and connected with the realm of cycling. Subsequently, I will show in which ways can be video used for researching. Ultimately, the most important part of this paper will be dedicated to practice shown on examples of two different but in many ways similar investigations. The mobility paradigm, turn from analysing society to analysing mobility, was pioneered by John Urry (2000) in his book Sociology beyond Societies: Mobilities for the Twenty-First Century. The author (2000, 2007) laid the foundations of mobility paradigm and proposed a shift from research on society to ... ...nvestigation. These are participatory video, videography and video elicitation. Accordingly, on an example of video use in sociological research practice we have demonstrated benefits and tried to find drawbacks of this methodology. When researching on cycling, we might encounter various obstacles. For instance, the terrain will not let the researcher to follow the participant and conduct uninterrupted interview in real time. By using of mobile video camera enables to experience and understand various practices (In our case cycling.) that would not be possible to approach and brings a new perspective into contemporary research. Moreover, use of representations allows researchers to produce knowledges that are hard to describe with language. Finally, we can clearly see from our evidence that video bridges the gap between the embodiment of practice and the language.

Ethnics and Heritage Destroyed George in Gloria Naylor’s Mama Day :: Gloria Naylor Mama Day Essays

Ethnics and Heritage Destroyed George in Gloria Naylor’s Mama Day It has been said before that opposites attract when it comes to love. In Gloria Naylor’s Mama Day, two people who would seemingly never end up together somehow find a way to form a relationship that eventually leads to a marriage. George and Cocoa, the two lovers featured in this book, come from backgrounds that could not be more unlike the other. How they end up falling in love is close to a miracle, but because of their huge difference in background, they bring to each other what they wish they could have in themselves. While George is a man who comes from the diverse and strictly governed big city atmosphere of New York, Ophelia is a woman who was raised on the island of Willow Springs which is inhabited by descendants of slaves and is subject to racism and disregard for normal conduct in society. New York is a place where science and facts control the decisions of life; Willow Springs has many rituals based on magic and superstition. Because the two locations are so incre dibly opposite from one another, it is difficult for George to believe in anything that Cocoa was raised on. However, in order for George to get Mama Day’s approval, he must believe and understand magic as it exists in Willow Springs both in its physical form and as a form of belief. The biggest influence of magic on the island of Willow Springs is Mama Day. A descendant of the legendary Sapphira Wade, Mama Day is said to have convinced her master to give the land that is Willow Springs to the slaves, for which she â€Å"†¦bore him seven sons in less than a thousand days, to put a dagger through his kidney and escape the hangman’ noose, laughing in a burst of flames.† (Naylor 3) The influence of Sapphira’s magic is carried over into Mama Day, as it is said that she could, â€Å"†¦walk through a lighting storm without being touched; grab a bolt of lightning in her hand; use the heat of lightning to start the kindling going under the medicine pot.† (Naylor 3) For a rational minded person like George, this and some of the other traditions can be hard to accept. One such example of George’s ideas of normal human behavior clashing with Mama Day’s occurs when Mama Day and Grandmother Abigail give the married couple a quilt made entirely of articles of clothing from past generations.

Modifications to the National School Lunch Program Essay

Introduction Recent modifications made to the National School Lunch Program menu have caused controversy all across the nation. In last year The National School Lunch program have been under scrutiny and major changes have been made to the ingredients and preparation of school lunches. The USDA reports that the all the modifications to the school lunches are focus towards improving the health of all school age children, contributing to the fight against childhood obesity and succinctly to improve the health of all children across the nation. This research would explore the history of the different federal agencies involve in the national nutritional services, the most comprehensive changes in the school nutritional environment , the old and new menus choices and how changes are impacting students (National School Lunch Program,[NSLP] 2012). Research Statement According to the Unites States Department of Agriculture Food and Nutrition Service the recent changes to the National School Lunch program have been an important aid in the fight against childhood obesity and to help change student eating habits towards a healthier approach. In the last 4 years the Senate of the United Stated has proposed different legislature changes to the National School Lunch menu allowing millions of dollars to contribute towards a healthier approach modifying what student age children are consuming during school hours. The most comprehensive changes have been oriented towards reducing fat, sugar and sodium, and including more vegetable as part of the daily school cafeteria menu (United States Department of Agriculture, [USDA] 2012). Initial Research Question How the recent changes to the national school lunch program can improve the student’s health? By analyzing the recent changes to the national school lunch program we will be able to compare some of the differences between some the new and improve school lunch menu and how these changes are impacting students across the nation. Review of literature The National School Lunch Act was a law established under the administration of President Harry Truman in 1946. The original purpose of the act was to help local farmers with surplus produce and using these foods to feed school age children. After reviewing the principles of the act, members of the senate requested the establishment of a national program that under the guidelines of the National School Lunch Act, would oversee all operations associated with school lunch meals, reason for the creation of the National School Lunch program. The National School lunch program manages one of the largest federally assisted meal programs that provides nutritionally balanced meals free or at low cost to school age children. The national school lunch program takes cash subsides and foods provided by the U.S Department of Agriculture, in return the national school lunch program must meet nutritional federal requirements and most important must offer meals free or at low cost to all student age children. According to reported statistics from the U.S Department of Agriculture the National School Lunch feeds over 30 million students each day (NSLP, 2012) There is no doubt that the student nutrition subject has been an important topic of national concern in the history of our country. In 1966, The Child Nutrition Act was a law signed by President Lyndon B Johnson, encouraged by a national concern over nutrition in school age children. The Child Nutrition Act became to be an instrument to facilitate the process of meeting nutritional needs of children under the guidelines of the National School Lunch Program. The act also helped established the school based breakfast program providing free breakfast for children in public and nonprofit schools, during the signing of this act president Johnson use a famous phrase that would change forever the futures of national school lunches â€Å"Good food is essential to good learning† (USDA, 2012) U.S Department of Agriculture is a federal funded division who is responsible to all operations in the nation pertaining to farming agriculture and food. Better known as the USDA the department not only promotes and helps farming and agriculture issues but ensures food safety across the nation. The USDA is one of the oldest federally department created by President Abraham Lincoln in 1862. The USDA oversees a vast amount of operative units in the united states including the USDA Food and Nutritional Services who major goal is to provide healthy food to families in need, the department also collaborate closely with the National School Lunch program providing foods that are of nutritional value (USDA, 2012) On December 13th, 2010 President Obama sign into a law the Healthy, Hunger –Free Act of 2010. This act was creating to combat the alarming rates of childhood obesity cases in the U.S. The now law came to update the school meals standards who reflected very little changes in nutrition in the last 15 years, the HHFK Act also had an impact on the USDA, changing the foods providing to the National School lunch program and succinctly reflecting changes in meal nutritional standards in schools across the nation. In the 2009 a review from the Institute of Medicine recommended several updates to the National School lunch menus, the review found that the school cafeteria menus were not meeting the dietary guidelines for school age children stated by the U.S Department of Agriculture Food and Nutrition Services (Healthy Hunger-Free Act, [HHFA] 2012) In 2011 the USDA proposed new regulations based on the finding of the Institute of Medicine of the United States. The process of modification of the school cafeteria menus begin slowly but steady on schools across the nation, the changes included whole grain servings on all meals; reduce saturated fat sugar and sodium, and more fresh fruit and vegetables. Elizabeth Ippel, executive director of The Academy of Global Citizenship in Chicago, talks about the important of nutrition’s â€Å"good nutrition is essential and a very integral component to effective learning†. The changes are significant and according to Mrs. Ippel the students are responding positive to the modifications (Leamy, 2012) Here’s an example of a before and after lunch menu: BeforeAfter Breaded beef patty on a white roll Baked Fish Nuggets Fruit popsicleWhole wheat roll Low fat milkMashed potatoes Broccoli Peaches Skim Milk Discussion On December 13, 2010 president Obama signed into law 111-296 the Healthy Hunger –Free Act of 2010. The act is one of the most comprehensive proposals in the school nutritional environment in over 15 years; the main goal of this law is to update school meals nutritional standards to help combat childhood obesity and help students achieve healthy eating habits. Beginning in July 2012 the new lunch meal pattern will be in effect changing what students will be consuming during lunch in the school year 2012-2013.The new proposed meal components includes key changes for children K and above, these changes requires that school lunches offer a daily variety of whole grains, fruit and vegetables. In the fruit category, each meal provided by school cafeterias must include  ½ cup of fresh, frozen or canned fruits, prepared or compound with water and not syrup.  ½ of vegetables on each meal is another requirement in the daily school lunch menus; the new regulations required a variety of vegetable groups including: dark green, red/orange, legumes, starchy and other vegetables. On the area of whole grains, breads and cereals are required on each meal as long as the food item includes more than 8 grams of grains. The act has also limit the amount of flavored milks opting for only low fat milk during meals. Calories are also under a scope view limiting the calorie ranges according to age groups. Trans-fat is banned completely from school cafeteria menus and the act has also a plan to limit sodium gradually over the next decade, to reach the goal of keeping sodium at a no more than 600 mg per meal, equal to a diet frozen meal (HHFKA, 2012). The changes in the cafeteria school menu are impacting students and teachers equally, besides of more nutritional value, the new menus now offered more quantity amounts of healthier foods, satisfying the hunger of millions of students and reflecting healthier attitudes in the classrooms. LuAnn Coenen from Appleton Central High School in Wisconsin cheers the new regulations in the cafeteria menus and states† Since the introductions of the new food program, I have noticed and enormous difference in the behavior of my students in the classroom,†Ã¢â‚¬ I can say without hesitation that it’s changed my job as principal†. It seems that less sugary foods and drinks are impacting student’s behavior. An associate professor of education at the Lehigh university conducted a study of over 2000 lunchrooms across the nations, the conclusions indicated that healthier and less sugary meals carries a calmer atmosphere in the classroom this calmer demeanor is reflects when students go back to the classrooms creating a trickling effect. Taylor a student from Appleton High commented about the changes she felt since the cafeteria menus changed â€Å"I’d say being able to concentrate better†. Susan Graham principal from Melrose Elementary in Tampa Florida confirms that her discipline referrals have decreased 50 % â€Å"We get a lot more done, I think it’s a lot more efficient work environment for all of us,† Grahams said (abcnews,2012). Berger (2005) wrote about the importance of a well balanced meal for the proper development of children’s brain development, and how school meal programs played an important rolled in children’s brain development, by providing a well balanced meal while in school children can achieve proper brain development a subsequently their ability to learn will be maximized (Berger, 2005). The changes happening in schools cafeterias might seem insignificant, but replacing extra-cheese pizza, deep fried chicken for whole wheat pizza and baked fish nuggets, represent a huge step towards making students healthy. Some modifications to the school lunch menu have happened slowly and some hidden from students, like replacing full fat cheese with a low fat mozzarella cheese in the pizzas, as well as using whole wheat bread on grill cheese sandwiches. Dr. Saira Jan a Rutgers University Professor (2006) comments on children obesity and diabetes rising numbers â€Å"Kids choose from what they are offered. They are hungry, they will eat. You can offer carrots or French fries. We have a big health-care problem. We can’t just talk about it† (Weekly Reader, 2006). Conclusion In conclusion the overall national concern over childhood obesity and the rising rate of diseases in children related to overweight issues is currently being addressed by different entities in charge of school nutrition. The National School lunch program has and will make modification on the students’ lunch menu to feed students healthier foods in the effort to fight childhood obesity. Even though there has been mixed opinions about the effectiveness of the lunch menu modifications, the HHFKA guidelines demonstrate how References About USDA. (2012). United States Department of Agriculture Food and Nutrition Service. Retrieved from http://www.usda.gov/wps/portal/usda/usdahome?navid=ABOUT_USDA Berger, Kathleen. (2005).The Developing Person Throughout the Lifespan. 6th ed.Worth. 140-142 Child Nutritional Act.(2012). United States Department of Agriculture Food and Nutrition Service. Retrieved from http://www.gpo.gov/fdsys/pkg/FR-2012-01-26/pdf/2012-1010.pdf Food Fight! Should School Lunches be healthier? Current Events, a Weekly Reader publication,17 Feb.(2006) Retrieved from Healthy Hunger-Free Kids Act of 2010. (2012).United States Department of Agriculture Food and Nutrition Service. Retrieved from http://www.fns.usda.gov/cnd/governance/legislation/cnr_2010.htm Questions & Answers on the Final Rule, â€Å"Nutrition Standards in the National School Lunch and School Breakfast Programs†(2012).United States Department of Agriculture Food and Nutrition Service. Retrieved from http://www.fns.usda.gov/cnd/Governance/Policy-Memos/2012/SP10-2012osr2.pdf Lazor, K., Chapman, N., & Levine, E. (2010).No.80. Vol.4. 200-206 Soy Goes to School: Acceptance of Healthful, Vegetarian Options in Maryland Middle School Lunches. Journal Of School Health. Leamy, Elizabeth.(2011). Exclusive: USDA to Announce Healthier New School Lunch Guidelines. Retrieved from http://abcnews.go.com/Health/ConsumerNews/usda-announce-school-lunch-guidelines/story?id=12603193 Mary Bruce. (2010). Coming Soon? Healthier School Lunches. Retrieved from http://abcnews.go.com/Politics/healthier-school-lunches-senate-approves-45-billion-bill/story?id=11345256 Mcginn, D., & Popescu, R. (2007).No 150. Vol.17. Unlucky Charms At Lunch. Newsweek. Retrieved from http://mediacast.usw.edu:8045/ps/i.do?id=GALE%7CA169875850&v=2.1&u=nm _a_elin&it=r&p=ITOF&sw=w National School Lunch Program.(2012).United States Department of Agriculture Food and Nutrition Service. Retrieved from http://www.fns.usda.gov/cnd/Lunch/ Nutrition Standards in the National School Lunch and School Breakfast Programs, No 17, Vol.77. (2012). United States Department of Agriculture Food and Nutrition Service. Retrieved from http://www.gpo.gov/fdsys/pkg/FR-2012-01-26/pdf/2012-1010.pdf Students behave better with healthy lunches. (2012). Abc. go. Retrieved from http://abcnews.go.com/GMA/AmericanFamily/story?id=125404&page=1

Learning Theories Essay

This chapter takes a brief look at the two major categories of learning theories (behaviorism and constructivism), the major theorists within those categories, and the implications of those theories for the use of multimedia and communications and information technology for learning purposes. A separate section within the chapter provides a brief overview of learning based upon neuroscience and recent discoveries about the functioning of the brain. A series of links are provided to further resources on learning theory, neuroscience, and the brain. pic] Our Technological Revolution and the Implications for the Way We Learn We have all experienced a learning moment when we were so focussed or engulfed in the learning, that everything else did not matter. Candidly, the raison d’etre or motivation for our focus may have been that we had a boss or teacher breathing down our neck or an impending exam was to quantify our level of knowledge or intelligence or a particular moment neces sitated that a skill be learned very quickly. Regardless of the motivating factors for this moment of focussed learning, the experience is what psychologists Mihaly Czikszentmihalyi and Ellen Langer label in their respective theories, as moments of â€Å"optimum flow† or â€Å"mindfulness†. According to psychologist Mihaly Czikszentmihalyi, optimum flow occurs when: Alientation gives way to involvement, enjoyment replaces boredom, helplessness turns into a feeling of control, and psychic energy works to reinforce the sense of self, instead of being lost in the service of external goals. (Czikszentmihalyi, 1990, p. 9) Replicating such moments of optimum flow is the job of educators regardless of the domain, whether it be school, the workplace in job training, or the military, etc. Moreover, certain learning theorists are advocating the greater use of technology, namely computers, in learning situations because they see enormous potential of computer technology to replicate these optimum moments of flow. Learning is a personal act. We each place our own personal stamp on how we learn, what we learn and when we learn. We in effect have our own learning style. Howard Gardner’s theory of multiple intelligences which acknowledges learning as an holistic experience is, at present, one of the most well known descriptors of human cognitive profiles. The act of learning is paradoxical in nature. It can at times appear to be a very simple act. So simple, that we do not question its presence in how we go about our daily activities, for it is natural to our existence as learning organisms. Yet, when we encounter difficulties in learning something, we no longer take the learning process for granted. It is only then that our metacognition or awareness of how we learn is heightened. Learning is taken for granted as a natural process. As simple a process it may seem, the root of understanding how we learn is not as straight forward. The existence of numerous definitions and theories of learning attest to the complexity of this process. A random sampling of any educational psychology text will illustrate the variance in views to what exactly is learning and how we do learn. In Educational Psychology: An Introduction, for example, the authors write, â€Å"Learning implies a change in the individual as a result of some intervention. It may be viewed as an outcome or as a process. (Belkin and Gray, 1977, p. 211) While this definition reflects a behaviorist view of learning, for it equates learning as an outcome, it is a starting point for the authors to expand their description of learning into many other realms, namely the different theories of learning. They in effect, devote a whole chapter of their text just to describe the many ways of defining learning. While it may seem somewhat premature to evaluate the aforementioned definition of learning and to equate it with a specific theory, it is important to recognize that â€Å"intervention† in the learning process can imply many different things. The degree of intervention, by who or what and how, are the defining factors of a learning theory. These factors help distinguish the many different theories. As you will see these theories are not stagnant. They are evolving and changing as we discover new ways of viewing human cognition. â€Å"The mechanistic model of the mind of the behavior era has given way to the logical-computational model favored by artificial intelligence and cognitive science theorists† (McLellan, 1996, p. 6). Don Tapscott, in his book Growing Up Digital: The Rise of the Net Generation, argues that we are now in a digital era of learning. According to Tapscott, a transformation in learning is taking place from what he labels â€Å"broadcast† learning to â€Å"interactive† learning. No longer are today’s generation of learners satisfied in being the passive recipients of the traditional teaching process, rather, they want to discover it for themselves by becoming interactive with the learning. The net generation children using GlobaLearn [a web site], are beginning to process information and learn differently than the boomers before them. New media tools offer great promise for a new model of learning – one based on discovery and participation. (Tapscott, 1998, p. 127) Tapscott’s thesis that the â€Å"technological revolution† is permeating every aspect of our lives forces us to examine the use of computer technology as learning devices. Such rapid social, economic and general lifestyle change, due in essence to the technological revolution, begs the question – based on learning theory, why does the use of computers as a â€Å"learning† tool make sense? This chapter will answer this question by profiling the many learning theories. [pic] The Spectrum of Learning Theories As a review of the literature of learning theories will illustrate there are many labels being used to describe the many theories. Moreover, there are many theorists associated with each approach. A categorization of these labels and theorists will help in understanding these fundamental theories. The spectrum of learning theories consists of many approaches or ways of explaining how humans learn. A description of each of these theories will suffice in providing you with enough knowledge to critically examine the use of computer technology as a learning device. The resume of each theory will consist of: †¢ the associated names of the theory †¢ a description of the theory †¢ theorists associated with the theory †¢ hyperlinks on the World Wide Web Diagram #1: The two extremes Behaviorism   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚     Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚     Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚     Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Constructivism The extremes of this learning theory spectrum are represented by respectively, the Behaviorist and Constructivist theories of learning. As theories trying to explain the same thing, they are bipolar based on their respective views of how knowledge is acquired and the intervention of tools of learning (teachers or instructors). As a context to better understand all of the theories of learning presented in this chapter, examine these two extremes first and then place the remaining theories onto the spectrum. [pic] Behaviorism The Associated Names of this Theory: Behaviorism labelled as a teaching approach is often referred to as directed instruction. As you compare this theory with the Constructivist view of learning, this label will become self-evident. Also in contrast to Constructivism, it has been labelled an objectivist theory of learning. Theorists associated with Behaviorism: J. B Watson E. L Thorndike B. F Skinner A Description of Behaviorism: The concern or emphasis of Behaviorism is observable indicators that learning is taking place. Contrasting this view of learning is the emphasis of cognitive psychologists who equate learning with the mental processes of the mind. Behaviorists do not deny the existence of these mental processes. In fact, they acknowledge their existence as an unobservable indication of learning. The focus of Behaviorism is on the conditioning of observable human behavior. J. B Watson, the father of Behaviorism, defined learning as a sequence of stimulus and response actions in observable cause and effect relationships. The behaviorists’ example of classical conditioning demonstrates the process whereby a human learns to respond to a neutral stimulus in such a manner that would normally be associated with an unconditioned stimulus. The supporting example often cited with classical conditioning is the case of Pavlov’s dog. The focus of Pavlov’s experiment was the digestive process in animals. In conducting the experiment, Pavlov noticed that the dog would salivate (response), upon hearing the ringing of a bell. This occurred because the dog had learned to associate its unconditional stimuli (normally feeding), with the neutral stimuli of the bell ringing simultaneously with the feeding process. Watson, believed that the stimuli that humans receive may be generated internally (for example hunger), or externally (for example, a loud noise). B. F. Skinner expanded on the foundation of Behaviorism, established by Watson, and on the work of Edward Thorndike, by focussing on operant conditioning. According to Skinner, voluntary or automatic behavior is either strengthened or weakened by the immediate presence of a reward or a punishment. â€Å"The learning principle behind operant conditioning is that new learning occurs as a result of positive reinforcement, and old patterns are abandoned as a result of negative reinforcement. † (Belkin and Gray, 1977, p. 9) In his book entitled, The Technology of Teaching, Skinner wrote: The application of operant conditioning to education is simple and direct. Teaching is the arrangement of contingencies of reinforcement under which students learn. They learn without teaching in their natural environments, but teachers arrange special contingencies which expedite learning, hastening the appearance of behavior which would otherwise be acquired slowly or making sure of the appearanc e of behavior which otherwise never occur. (Skinner, 1968, p. 4) Skinner believed that more complex learning could be achieved by this process of contingencies and reinforcement â€Å"†¦ through successive stages in the shaping process, the contingencies of reinforcement being changed progressively in the direction of the required behavior. † (Skinner, 1968, p. 10) Applying the theoretical principles of Behaviorism to learning environments, it is easy to recognize that we have many â€Å"behaviorist artifacts† in our learning world. A dissection of the traditional teaching approaches used for years would reveal the powerful influence that Behaviorists have had on learning. The concept of directed instruction, whereby a teacher is providing the knowledge to the students either directly or through the set up of â€Å"contingencies†, is an excellent example of the Behaviorist model of learning. The use of exams to measure observable behavior of learning, the use of rewards and punishments in our school systems, and the breaking down of the instruction process into â€Å"conditions of learning† (as developed by Robert Gagne), are all further examples of the Behaviorist influence. With the advent of the computer in school, C. A. I. , or computer-assisted instruction has become a prominent tool for teaching, because from a Behaviorist perspective, it is an effective way of learning. CAI uses the drill and practice approach to learning new concepts or skills. The question acting as the stimulus, elicits a response from the user. Based on the response a reward may be provided. The â€Å"contingencies† of learning are translated into different levels of the program. Rewarding the user to a different level for correct responses follows exactly the approach of operant conditioning. Educators have espoused CAI as an effective teaching approach because it allows for self-paced instruction and it liberates them from the direct instruction of all their students so as to focus on those students with particular needs. Hyperlinks to Behaviorist Web Pages: http://www. coe. uh. edu/~srmehall/theory/theory. html http://tecfa. unige. ch/edu-comp/edu-s94/contrib/schneider/learn. fm. html#REF13085 http://www. sil. org/lingualinks/library/literacy/fre371/vao443/TKS2569/tks347/tks734/ http://mse. byu. edu/ipt301/jordan/learnterm_b. html [pic] Constructivism: The Associated Names of this Theory: Constructivsm is recognized as a unique learning theory in itself. It however, may be associated with cognitive psychology because as a theory of learning it focuses on a learner’s ability to mentally construct meaning of their own environment and to create their own learning. As a teaching practice it is associated with different degrees of non-directed learning. The term constructivsm is linked to Cognitive and Social Constructivsm. Theorists associated with Constuctivism: John Dewey Lev Vygotsky Jean Piaget Jerome Bruner Seymour Papert Mitchell Resnick A Description of Constructivism: The merits of Behaviorist learning theory and of their teaching practices are well documented. They have served well in teaching a growing North American population over the past six decades. Behavioral learning theory manifested itself in creating a systematic approach to teaching. Robert Gagne and Leslie Briggs, in their book, Principles of Instructional Design, combined Behaviorist principles of learning with a cognitive theory of learning named Information-Processing. The focus of the latter theory in this combination was of the internal processing that occurred during a learning moment. The design of instruction must be undertaken with suitable attention to the conditions under which learning occurs. With reference to the learner, learning conditions are both external and internal. These conditions are in turn dependent upon what is being learned. How can these basic ideas be used to design instruction ? How can they be applied to the design of single lessons, of courses, and of entire systems of instructions ? (Gagne and Briggs, 1974, p. 14) Gagne and Briggs’ principles of instructional design broke down the teaching process into a systematic process of nine steps. It is in effect, this type of systematic approach to teaching that acted as the catalyst for the creation of another view of the way humans learn. Behaviorist learning theory had served its purpose and its approach and goals were becoming outdated according to Constructivists like Seymour Papert. Constructivist learning theory sought to improve on what Behaviorist learning theory had already established by focussing on the motivation and ability for humans to construct learning for themselves. It viewed Behaviorism as being too teacher centered and directed. Constructivists regarded the educational system as a process of matching skill objectives with test items. It was void of meaningful learning. They also saw the teaching process focus too much on individual work rather than on group work. The final critique of Behaviorist learning theory from the Constructivist perspective helped define the core of Constructivism. To imply that knowledge is separate to the human mind and that it must be transferred to the learner in a teacher centered approach fundamentally was counter to the Constructivist theory of learning. Constructivists believe that all humans have the ability to construct knowledge in their own minds through a process of discovery and problem-solving. The extent to which this process can take place naturally, without structure and teaching is the defining factor amongst those who advocate this learning theory. Jean Piaget, a Swiss psychologist, observed human development as progressive stages of cognitive development. His four stages, which commence at infancy and progress into adulthood, characterize the cognitive abilities necessary at each stage to construct meaning of ones environment. Seymour Papert, psychologist and contemporary critique of Behaviorist teaching methods, writes in his book, The Children’s Machine: Thus, constructionism, my personal reconstruction of constructivism has as its main feature the fact that it looks more closely than other educational -isms at the idea of mental construction. It attaches special importance to the role of constructions in the world as a support for those in the head, thereby becoming less of a purely mentalist doctrine. (Papert, 1993, p. 42) As the inventor of LOGO, the programming tool for children, Papert too believed that children as learners have a natural curiosity to construct meaning of their world. The educational system as Papert saw it was too structured and it stifled this natural curiosity. The means by which children were being taught relegated them to a role of passive recipients of the teaching hence, they were not motivated to construct any learning for themselves. Learning according to Constructiv ists is a question of motivating an individual to attach new meaning to past cognitive experiences. According to Papert: It [constuctivsm] does not call in question the value of instruction as such. That would be silly: Even the statement (endorsed if not originated by Piaget) that every act of teaching deprives the child of an opportunity for discovery is not a categorical imperative against teaching, but a paradoxically expressed reminder to keep it in check. The constructionist attitude to teaching is not at all dismissive because it is minimalist – the goal is to teach in such a way as to produce the most learning for the least teaching. Of course, this cannot be achieved simply by reducing the quantity of teaching while leaving everything unchanged. The principle other necessary change parallels an African proverb: If a man is hungry you can give him a fish, but it is better to give him a line and teach him to catch fish himself. (Papert, 1993, p. 139) Papert’s desire to have children become motivated learners, critical thinkers, problem-solvers and metacognitionists is to be achieved through educational reform that provides the learner with the necessary tools to participate and to take ownership of the learning process. According to Papert, the computer is the appropriate tool to achieve such desired educational reform. These desired objectives of Papert and others who share the Constructivist view of learning are coming closer to reality as more people discover the power of computer technology. From Donald Tapscott’s perspective, Papert’s desired reality is happening now, as a paradigm shift to more interactive learning due to the exploitation of the digital media is taking place in our learning institutions. Tapscott cites eight shifts in learning today: †¢ From linear to hypermedia. †¢ From instruction to construction and discovery. †¢ From teacher-centered to learner-centered education. †¢ From absorbing material to learning how to navigate and how to learn. †¢ From school to lifelong learning. †¢ From one-size-fits-all to customized learning. †¢ From learning as torture as learning as fun. †¢ From the teacher as transmitter to the teacher as facilitator. Hyperlinks to Constructivist Web Pages: http://www. tcimet. net/mmclass/summer/CHPTales. tm http://www. coe. uh. edu/~srmehall/theory/construct. html http://www. gwu. edu/~tip/bruner. html http://www. mamamedia. com/areas/grownups/people/seymour. html http://www. mamamedia. com/areas/grownups/home_alt. html http://lynx. dac. neu. edu/home/httpd/t/tjohnson/papert%20history. htm [pic] Fitting the other Theories onto the Spectrum The two extremes of the spectrum have been outlined (refer to diagram #2). Inherent within each of these two extremes are related theories. Diagram #2: (Spectrum Summary) Behaviorism   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚     Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚     Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚     Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Constructivism   Directed Instruction   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Non-directed Instruction Objectivist   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚     Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Constructivist Teacher-centered   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Learner-centered Behavioral observations   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Cognitive operations Focus on the individual   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚     Ã‚   Group work is emphasized More focussed on one approach   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   More holistic in approach Fundamentally, Constructivism is a cognitive learning theory because of its focus on the mental processes that construct meaning. Other learning theories equated with cognitive psychology are: Information-Processing theory, Scaffolding theory (associated with the Russian philosopher Lev Vygotsky) and Brain-based learning theory (associated with neuroscientists such as Marian Diamond and Robert Sylwester and educator Susan Kovalik). Information-Processing theory regards human learning as being analogous to a computer and its ability to store memory. As humans we process information initially with our senses. This information is either processed into our short term memory or it is lost. If this information is used and practised it is only then put into long term memory. Lev Vygotsky thought that our cognitive development was directly related to our social development. The culture we live in influences our social and cognitive development according to Vygotsky. He further recognized the differences of how the world is seen by children and by adults. Vygotsky labelled this difference in cognitive ability as the â€Å"zone of proximal development†. The job of educators was to identify this zone and to find out where the child was situated in this zone and build upon their specific level through a â€Å"scaffolding† process. Building from what the learner knows is in essence, anchoring the learning on past experience. Such anchoring is fundamental to Constructivist theory of learning. Computer technology is viewed by Seymour Papert as an excellent means to anchoring learning to meaningful experiences. The complexity of understanding how humans learn is reflective of our complexity as biological, social and cognitive animals. Many theories exist, all focussing on different aspects of our make-up as humans. Each theory is an attempt to explain how we learn, act and behave: Sigmund Freud focussed on our sub-conscious, Skinner on our observable behavior, cognitive psychologists on our mental processes, humanistic psychology on our social and interpersonal development. Howard Gardner took a more holistic approach in describing our cognitive profiles. His classification of human intellectual ability into seven intelligences incorporates many aspects of psychology to define the cognitive behavior of humans. Before moving on to Multiple Intelligences , refer to the following hyperlinks for information on other learning theories. http://mse. byu. edu/ipt301/jordan/learning. html [pic] Theory of Multiple Intelligences: Human intelligence should not be equated solely with linguistic or logical-mathematical intelligence alone, according to Howard Gardner. As the author of a new way of looking at human intelligences, Gardner, a Harvard professor, identified a total of seven different intelligences that humans may possess. His list includes: †¢ Linguistic intelligence †¢ Logical-mathematical intelligence †¢ Spatial intelligence †¢ Musical intelligence †¢ Bodily-kinesthetic †¢ Interpersonal intelligence †¢ Intrapersonal intelligence Gardner is working on more intelligences that qualify as cognitive processes: â€Å"Multiple intelligences theory, on the other hand, pluralizes the traditional concept†(Gardner, 1993, p. 15) Gardner’s fascination with human intelligence and how the brain works was started with an investigation of people who had experienced brain damage of some sort. He recognized that not all abilities, whether cognitive or motor-sensory, were eliminated from the individual’s repertoire despite having endured some form of brain damage. Gardner hypothesized that we possess more than one form of intelligence. The theory of multiple intelligences provides a more holistic view of the intelligence of humans. Gardner advocates that we may all attempt to develop each of these intelligences to our optimum level. However, we may be more adept in only certain of these intelligences. We may however, aspire through practice and development to improve in the remaining intelligences. The use of technology appeals to this view of intelligence in that Gardner’s theory acknowledges that cognition is not a linear process. The computer as a learning tool has enormous potential in developing the different forms of intelligences of Gardner’s theory. Hyperlinks to Multiple Intelligences Web Pages: http://www. athena. ivv. nasa. gov/curric/weather/adptcty/multint. html [pic] Learning Theories and the Brain What is Learning? Learning is the process by which we receive and process sensory data, encode such data as memories within the neural structures of our brain, and retrieve those memories for subsequent use. The variety of information stored within such memories is enormous, including such items as: how to control your sphincter muscle until a socially appropriate occasion, how to identify mommy in a crowd, how to ride a bicycle, what is the shortest path to grandmother’s house without going near the lair of the wolf, what is the tune for Beethoven’s Ode to Joy, and what a philosopher means when she says â€Å"The cat is on the mat. All learning takes place within the brain, and as our understanding of the underlying structures and processes of the brain increases we can begin to apply that knowledge to improve our construction of learning environments. Our ability to describe and understand the basic processes by which our brain learns has been enhanced by recent technological developments and by the accumulation of long-term studies in human and animal populations. Of particular benefit has been the development of brain-imaging techniques that allow us to observe the operation of normal human brains during the performance of a variety of tasks. Magnetic Resonance Imaging (MRI) and similar technologies have allowed researchers to map neural activity during sensory data processing and monitor the transfer of information into long-term memory. Researchers have also made great strides in determining the basic mechanisms that underlie the transmission of information within the brain. Such research on brain structure, neural transmitters, and the process by which memories are stored and retrieved have allowed the development of neuro-physiological models of learning. Although neuroscience has provided us with an increasingly rich and accurate descriptive theory of learning within the brain, we still need prescriptive theories of how to maximize the efficiency and capacity of human learning. To some extent all learning theories are prescriptive and seek to minimize the time required to transfer information into memory and maximize the efficiency of retrieving that information. Our current knowledge of the brain, and our speculations regarding the evolutionary function of learning, should assist such prescriptive theories in designing learning environments that provide for maximum learning efficiency. In particular, prescriptive theories informed by our current knowledge of neuroscience should allow us to evaluate the role of multimedia in learning environments. We should also be able to maximize the impact of multimedia in such environments through application of learning theories and our knowledge of the human brain. Learning environments should not be construed simply as the traditional formal classroom within the context of institutionalized public education. Such environments occur within the workplace, the home, and other social institutions as communication and information technology continues to penetrate Western society. We should also be aware that the use of multimedia will have an impact upon the development of the human brain, particularly when such techniques are used with children and adolescents whose brains are still developing and maturing. [pic] The Brain The three-pound universe that is our brain consists of more than 100 billion neurons and the associated structures that organize, nourish, and protect their functioning. Each neuron may have between 5,000 and 50,000 connections to other neurons, forming a dense connective mat that allows the storage of enormous amounts of information. It is important to remember that structures within the brain continue to develop until late adolescence and that neurons will continue to grow connections to other neurons throughout adult life. [pic] Brain Structures The diagram above shows four basic structures in the brain that are important for bodily functions and for learning and memory. The brain stem is primarily concerned with basic survival functions and the regulation of body systems. The cerebellum is involved in the performance of automatic movement patterns (walking, running, touch-typing, and other physical skills that can become part of automatic procedural memory). The limbic system is responsible for the processing of short-term memory into long-term memory as well as the generation and regulation of emotions. The cerebral cortex is the area of the brain in which sensory data is received and analyzed, decisions are made, and behavioral responses are activated. Information is received from the major sensory organs of the body: eyes, ears, nose, tongue, and skin; and is held briefly in sensory memory. The further processing of that information appears to be dependent upon the state of emotional arousal of the brain and the utility of such information for potential survival. Long-term memories are generated through the growth and spread of neural connections between those modular structures that contain the memory (Sylwester, 1995, pp. 89-90). The more often such structures are activated and the stronger the connections become to associated structures, the more easily such memories are retrieved and used by the brain in decision making and conscious thought. To some extent the driving forces behind the way our brain processes sensory input and makes decisions are the survival imperatives that accompanied human physical and cultural evolution. Our brains reflect the importance that survival places upon evaluating potential threat situations, making a quick response, and focusing all body resources on support of those functions that may lead to continued survival. In high-threat situations the focus of the brain will be almost exclusively upon what is identified as the potential threat while the body shuts down relatively unimportant systems to concentrate on those involved in the fight-or-flight response. Low-threat situations allow the brain to sample and evaluate a broader spectrum of sensory input and to analyze such input for future use. Thus a large looming shadow in the cave mouth tends to generate fear, prompting the body to shut down digestion, pump more adrenaline, and prepare the cerebellum to handle the process of running while the cerebral cortex looks for places to hide or make a stand. Strong negative emotion tends to evoke the fight-or-flight physiological and mental responses that shut down high-level cognition. A premium should therefor be placed upon the reduction of those factors within a learning environment that give rise to negative emotions. At the same time, sensory input that does not receive attention is not available for processing through short-term into long-term memory. Clearly a balance must be struck between too much and too little stimulation in learning situations. Some stimulation and motivation is necessary for the learner to pay attention to the data that they are required to learn; on the other hand too much stimulation (particularly in a negative context) is liable to create anger or fear as an emotional response, either of which can serve to reduce the amount of learning carried out within the environment. It appears that the limbic system plays an important part in the process of storing information as long-term memories. Those activities that provide an emotionally supportive environment may well have a positive effect upon the processing of information into long-term storage and subsequent retrieval of those memories. Group activities, co-operative learning, role-playing, and simulations tend to provide emotional support and emotional context for learning. Retrieval of long-term memories is enhanced when a large number of connections have been established between the neural modules that store such memories. To some extent our growing knowledge about the organization of the brain tends to support those theories of learning that can generally be labeled as constructivist. That is, situated knowledge that is connected to a large number of other memories is more apt to be recalled than is unconnected knowledge that has been learned by rote. Because the process of creating connections between ideas and memories is essentially carried out through a process of rehearsal and review, learners should be encouraged to review knowledge that is being learned and attempt to build connections to that knowledge that is already easily retrieved from long-term memory. Such cognitive tools as narration, story-telling, constructing metaphors, and making comparisons are strategies that help to build and maintain connections. The construction of knowledge is essentially the growing of connections between the neural modules that contain individual memories. [pic] Implications for Learning Theory If the apparent symmetry between contemporary brain-based learning theories and constructivism is accurate, then basic guiding principles of constructivism should be used in designing learning environments. These principles include: 1. Learning is a search for meaning. Therefore, learning must start with the issues around which students are actively trying to construct meaning. 2. Meaning requires understanding wholes as well as parts. Parts must be understood in the context of wholes. Therefore the learning process focuses on primary concepts, not isolated facts. 3. In order to teach well, we must understand the mental models that students use to understand the world, and the assumptions that support those models. 4. The purpose of learning is to construct one’s own meaning, not to have the â€Å"right† answers by repeating someone else’s meaning. Learning is inherently inter-disciplinary, and the only valuable assessment of learning is assessment that is part of the learning process and that provides students with information on the quality of their learning. (On Purpose Associates, 1998b) Such learning environments should also be designed around the ideas that come forward from brain-based learning. That is, they should employ the three instructional techniques associated with brain-based learning: â€Å"orchestrated immersion, where learning environments are created that fully immerse students in a learning experience; relaxed alertness, where an effort is made to eliminate fear while maintaining a highly challenging environment; and active processing, where the learner consolidates and internalizes information by actively processing it† (On Purpose Associates, 1998a). Learning environments constructed with these principles in mind will tend to be organized around thematic units featuring knowledge in depth and the exploration of projects that have real meaning for the participating learners. [pic] Implications for Multimedia How should we then use multimedia presentations of information to effectively learn in the context of current brain-based learning theory? The communications and information technology that constitutes contemporary multimedia platforms has some significant advantages in creating a learning environment, but there are some pitfalls that must be accounted for as part of the learning process. Multimedia, at its best, allows us to bring the real world to the learner through the use of sound and video. Such connection to the real world should serve as a factor in motivating students, and as a factor in providing them with additional connections to other knowledge structures. At the same time, multimedia allows students to experience information through multiple modes of presentation. Such multi-modal learning should help to build connections within the learner’s brain if only because multiple modes of reception will engage different areas of the learner’s brain. Contemporary multimedia platforms allow a greater degree of learner control and more freedom for the learner to undertake self-directed exploration of the material. Such self-directed learning is likely to be more meaningful and more connected to existing knowledge structures within the learner’s brain. Therefore, we should see advantages for learning programs that include multimedia presentations. Learners should also gain from the possibility of self-paced instruction based upon contemporary multimedia learning technology. Whenever possible, immediate feedback should be built into a multimedia program to assist students in forming correct connections prior to reinforcing connections between new and old information incorporated within existing knowledge structures. Designers of multimedia instructional packages should take comfort in the strengths of multimedia, but they should also be aware of potential problems in using multimedia with learners. Although current multimedia technology allows excellent presentation in both video and audio modes, and provides some tactile feedback through the use of keyboards, there is little to offer students who need tactile experience ? multimedia is essentially a bimodal presentation strategy unless additional work is done to prepare material for students. Even the best multimedia programs cannot provide the total stimulation that natural environments provide? we have yet to incorporate smell or taste into such presentations, and tactile sensations are still limited. More importantly, there is a clear danger that multimedia programs may be used to substitute for interaction with other learners. We should not be seduced by technical virtuosity or cutting-edge visual and aural effects, there is still a need for human interaction and emotional support. Above all else, we should beware of the tendency to substitute passive learning for active learning. Multimedia provides significant advantages in presenting information to learners, particularly if sufficient resources have been invested to create presentations that make full use of current technology. Presentation of information, no matter how technically sophisticated, is not enough; learners must interact with content to construct their own meanings and integrate new knowledge into the dense web of neural connections that is mind and memory. [pic]