合作学习是以学习小组为基本组织形式,系统利用教学动态因素之间的互动来促进学习,以团体成绩为评价标准,共同达成教学目标的活动。它是一种目标导向的教学活动①。新课程改革中,课堂教学充分体现出老师的主导、学生的主体作用,合作学习小组成为新课程改革中行之有效的方法之一,然而百花齐放的小组建立方式虽然在新课程教学中功不可没,但 Cooperative learning is based on the learning group as the basic form of organization, the system uses the interaction between the dynamic factors of learning to promote learning, group performance as the evaluation criteria, and jointly achieve the teaching objectives of the activity. It is a goal-oriented teaching activity ①. In the new curriculum reform, the classroom teaching fully reflects the teacher’s dominance, the main role of the students, and the cooperative learning group becomes one of the effective methods in the new curriculum reform. However, although the blossoming group formation method contributes to the new curriculum teaching, but