<Dd> Peer Instruction engages students during class through activities that require each student to apply the core concepts being presented, and then to explain those concepts to their fellow students . </Dd> <P> This approach made early use of a variant of the technique that is now known as the "flipped classroom": </P> <Dl> <Dd> To free up class time for ConcepTests, and to prepare students better to apply the material during class, students are required to complete the reading on the topics to be covered before class . </Dd> </Dl> <Dd> To free up class time for ConcepTests, and to prepare students better to apply the material during class, students are required to complete the reading on the topics to be covered before class . </Dd>

Who conceptualized the experiential learning model for 'peer learning'