Twenty years of research shows that using interactive techniques more often can make a class more effective. For example, a study of six thousand physics students compared classes using passive lecture to classes using interactive techniques that allowed for discussion among students and between the professor and students. The study showed that…

Evidence suggests that the usual classroom practices don't work and must be replaced by something more active and involving. Group-inquiry, an untraditional approach to the classroom, is described. Small groups examine central problems of the subjects under study, then a consensus is reported to the class. (MLW)