传统的数学课堂,教学方式单一,呈现以教师讲,学生听得被动接受式教学,由此造成学生缺乏自主探索,独立获取知识的机会,压抑了学生的情感,扼杀了学生的创造思维.而新的课程理念提出,学习应该是学习者主动建构的过程,教师的角色是思想的催化剂,课堂教学应改变传统封闭型教学方式,实行开放式教学. In the traditional mathematics classroom, the teaching method is single, which is presented by the teacher and the students hear the passive teaching, which results in the students lacking the chance to independently explore and acquire knowledge, which depresses the students ’emotion and stifles students’ creative thinking. The new curriculum idea suggests that learning should be the process of learner initiative construction, the role of teacher is the catalyst of thinking, and the classroom teaching should change the traditional closed teaching method and carry out open teaching.