Abstract:  Recent developments in cognitive learning theory and classroom research suggest that most students experience improved learning when they are part of an interactive community and when they are given the opportunity to construct their own knowledge.  These results counter the belief that effective teaching must be instructor-centered, that is that content can be transferred directly from the expert to the novice.  Student centered approaches are based on the premises the students learn better when they are actively engaged and thinking in class.  In such an environment students work in small self managed groups to draw conclusions by analyzing data and discussing ideas, they learn how to work together to understand concepts and solve problems, and the instructor serves as a facilitator to assist students in the learning process.  Not only does such an approach energize students but it also provides instructors with instant and constant feedback about what the students understand and misunderstand.