Reports several field experimental research studies which tested the effects of group and individual incentive structures and tasks on individual academic achievement. The positive effects of cooperative learning methods result from the use of cooperative incentives, not cooperative tasks, apparently due to change in peer norms. (CB)

Small-group cooperative learning methods have improved achievement, low and high level cognitive learning, race relations and mutual student concern. Most of the research focuses on four approaches: Teams Games Tournament (DeVries), Student Teams Achievement Divisions (Slavin), Jigsaw (Aronson) and Small Group Teaching (Sharan). (Author/CP)