《数学课程标准》明确提出“有效的数学活动不能单纯的依赖模仿与记忆,动手实践、自主探究与合作交流是学生学习数学的重要方式”。作为新课程倡导的三大方式之一的合作学习,在形式上就有别于传统的学习方式。“合作”是学生在小组或团队中为了完成共同的任务,有明确责任分工的 “Mathematical Curriculum Standards” made it clear that “effective mathematical activities can not simply rely on imitation and memory, hands-on practice, independent inquiry and cooperation and exchange is an important way for students to learn mathematics.” As one of the three major methods advocated by the new curriculum, cooperative learning is formally different from traditional learning methods. “Cooperation” is the students in the group or team in order to accomplish a common task, there is a clear division of responsibilities