数学课程标准提出“教师应激发学生的学习积极性,向学生提供充分从事数学活动的机会,帮助他们在自主探索和合作交流的过程中真正理解和掌握基本的数学知识与技能、数学思想和方法,获得广泛的数学活动经验”。传统的班组单调的组织形式不能适应上述要求。我们在班级内部结构上作了些调整,成立三人合作学习小组,分组时坚持以下原则:1.异质同组,按好、 The standard of mathematics curriculum proposes that “teachers should stimulate students’ motivation to learn and provide students with opportunities to fully engage in mathematical activities to help them truly understand and master basic math knowledge and skills, mathematical ideas and methods in their own exploration and cooperation and exchange, Get extensive experience in math activities. ” Traditional team monotonous organizational form can not meet the above requirements. We have made some adjustments in the internal structure of the class, set up a three-person cooperative learning group, the group insisted on the following principles: 1. Heterogeneous group, according to the good,