With the deepening of the new mathematics curriculum reform in junior high school, teachers' teaching ideas have also changed, teaching models have also been updated, and the roles of teachers and students have also changed in the classroom, forming a new atmosphere of teachers singing and students singing. The original lifeless indoctrination teaching was replaced by a classroom full of democracy, relaxation and vitality, which truly realized that the classroom was wonderful because of the participation of students, and the teaching was efficient because of the display of students, which finally made the teacher relaxed.