Language and Learning in the Cooperative Classroom reports the results of an experiment on the effects of cooperative learning. The authors address the following questions in detail: Is the effect of cooperative learning on achievement more salient for pupils from the majority or minority ethnic groups? Do pupils who study with the Group-Investigation method display more extensive verbal interaction with their peers than pupils who study with the Whole-Class method? Is the pupil's verbal interaction in groups related to his/her academic achievement? The findings are discussed in terms of their relevance for classroom instruction, for different theories of language behavior and language research, and for issues regarding ethnic relations in multi-ethnic classrooms.