Group role-playing and collaborative exercises are exciting ways to diversify college students' classroom experience and to incorporate active learning into your teaching. This article reports the results of two experiments that compared the effectiveness of role-playing and collaborative activities to teacher-centered discussions and lectures. Using both history and political science classes, we show that the students who participated in the role-plays and collaborative exercises did better on subsequent standard evaluations than their traditionally instructed peers. Presented here is a discussion of active learning, descriptions of the two experiments, and an explanation of the outcomes and implications of the study. © 2000 Human Sciences Press, Inc.