Research bearing on three aspects of small group learning is examined: (1) the relationship between interaction and achievement, (2) cognitive process and social-emotional mechanisms bridging interaction and achievement, and (3) characteristics of the individual, group, and reward structure that predict interaction in small groups. (Author/PN)

This study investigated interaction and achievement in cooperative small groups in four junior high school mathematics classrooms. Ninety-six students learned a one-week unit on consumer mathematics in mixed-ability or uniform-ability groups. Students in mixed-ability groups scored higher on a problem-solving test than students in uniform-ability…