"Birds fly headless and soldiers are brave." Without the organization and command of the group leader, the study group is useless, and the students either act blindly or hesitate, so there is no cooperation at all. Moreover, junior students have poor self-control and are playful and active. Without a good cooperative learning atmosphere, classroom organization and discipline will be lax, and teaching can only get twice the result with half the effort. Therefore, we need to choose a student with strong sense of responsibility and strong communication skills as the group leader, and often have a heart-to-heart talk with the group leader to understand the activities of the group members and the needs of the students, so as to adjust in time, constantly encourage the group leader, establish his confidence, better promote cooperative learning within the group, and achieve good learning results.