I f you walk into Eric Mazur's Harvard physics class at the wrong time, you may think you're in a lounge instead of a lecture hall.
Students argue furiously.
His students are arguing about physics. Students record their answers and the arguments begin. After a few minutes, the question is put back up. Freshly convinced students record their answers in a second round of testing. In 1995, the ConcepTest System was chosen to be included in NSF's Profiles of Innovative Projects, a booklet highlighting 50 of NSF's education ventures.