《数学课程标准》提出:动手操作、自主探索、合作交流是学生学习数学的重要方式。这就要求教师在教学活动中不仅要给予学生充分的操作、探索的时间,还要给学生充分的交流合作的机会和方法,课堂讨论是让学生参与教学过程,体现学生主体地位的一种有效的方法。自从实施课程改革以 The “Mathematics Curriculum Standards” proposes that hands-on operation, independent exploration, and cooperation and exchange are important ways for students to learn mathematics. This requires that teachers not only give students sufficient time for operation and exploration in teaching activities, but also give students sufficient opportunities and methods for exchanges and cooperation. Class discussion is an effective way for students to participate in the teaching process and reflect the students’ status as the main body. Methods. Since the implementation of curriculum reform