With the development of society, people pay more and more attention to the spirit, consciousness and mode of cooperation. "Mathematics Curriculum Standard" also clearly points out: "Effective mathematics activities can't rely solely on imitation and memory, and hands-on practice, independent exploration and cooperative communication are important methods for students to learn mathematics." Therefore, teachers should actively advocate hands-on practice, independent exploration and cooperative communication in teaching. So how to play the role of group learning? First, the rational distribution of group members should give full play to the function of group learning, and the division of groups is the premise. Constructing a reasonable study group is the basis and premise for students to carry out cooperative learning, and it is also the basic means to realize student group cooperation. First of all, students should be comprehensively evaluated according to their basic knowledge, learning ability, intelligence, gender, psychological quality, hobbies and other aspects, and then grouped according to the principle of "heterogeneous in the same group, heterogeneous in the same group", and each group should have 4-6 people. If it is a group of four, there should be one top student, two middle school students and one student with learning difficulties. This can not only ensure the differences and complementarities among group members, but also be conducive to fair competition among groups. Teachers should regard students' individual differences as positive educational resources and implement dynamic group teaching. You can also adjust the staff regularly according to the students' learning situation to ensure the vitality of students' competition in groups and enhance the cohesion of students' cooperation in groups. Second, clarify the responsibilities of team members After establishing a cooperative learning group, it is necessary to clarify the responsibilities of each member in the group and highlight the role of each individual, so that everyone is not only responsible for their own learning, but also has the obligation to help others make progress and be responsible for the learning of other students in the group. A group, only under the leadership of a good group leader, can consistently discuss and explore a central topic, and finally find the law and get the method. The group leader is also the organizer of a collective learning activity, the teacher's right-hand man and the link between the teacher and the whole class. Therefore, choosing a good group leader is directly related to the efficiency and success of group learning activities. The team leader should choose students with certain appeal, responsibility and strong coordination ability. Team leadership is a rotation system, so that every team member has the opportunity to exercise and show. In a four-person team, there is a team leader, a recorder, a reporter and an operator. The group leader is mainly responsible for organizing and judging the discussion process and checking the students' mastery of the discussed issues; The recorder mainly records the speeches of the group members during the discussion, requiring students to have strong organizational skills and fast writing speed; The reporter is mainly responsible for reporting the discussion results in the group and asking students with strong language skills to serve; Operators are mainly responsible for the operation of the group, and need ingenious students to serve. After the implementation of intra-group division of labor, teachers should guide students to understand the principle of "division of labor without separation", and each student's role can be adjusted or rotated regularly according to the teaching situation to enhance students' sense of responsibility and enthusiasm for learning.