Decades of research shows that grades diminish students' interest in whatever they're learning, discourage students from taking academic risks, and reduce the quality of students' thinking, writes Kohn. Contrary to what many people assume, grades are not necessary to promote achievement. Attempts to "improve" grading--such as standards-based…

Responding to Slavin's critique of Kohn's article (in the same "Educational Leadership" issue) condemning cooperative rewards, Kohn slams Slavin's faulty research interpretations. Slavin may be correct that few non-reward-based classrooms exist in the U.S., but this hardly demonstrates that the best alternative to bribing individuals is to bribe…

Examines the assumption that interdependence is best achieved by using rewards. An impressive body of social science research has shown that rewards have limited effectiveness and can undermine interest in the task. Cooperative learning programs with appropriately balanced curricula, autonomy, and relationship elements function well without…