This is something many people have known intuitively for a long time — the physicists just came up with the hard data. Their work, along with research by cognitive scientists, provides a compelling case against lecturing. But with budgets shrinking and enrollments booming, large classes aren't going away. You don't have to lecture in a lecture hall though.Mazur's physics class is now different. Rather than lecturing, he makes his students do most of the talking.At a recent class, the students — nearly 100 of them — are in small groups discussing a question. Three possible answers to the question are projected on a screen. Before the students start talking with one another, they use a mobile device to vote for their answer. Only 29 percent got it right. After talking for a few minutes, Mazur tells them to answer the question again.This time, 62 percent of the students get the question right. Next, Mazur leads a discussion about the reasoning behind the answer. The process then begins again with a new question. This is a method Mazur calls "peer Instruction." He now teaches all of his classes this way."What we found over now close to 20 years of using this approach is that the learning gains at the end of the semester nearly triple," he says.One value of this approach is that it can be done with hundreds of students. You don't need small classes to get students active and engaged. Mazur says the key is to get them to do the assigned reading — what he calls the "information-gathering" part of education — before they come to class.http://www.npr.org/2012/01/01/144550920/physicists-seek-to-l...
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