《课程标准(2011年版)》提出:“数学课程应致力于实现义务教育阶段的培养目标,要面向全体学生,适应学生个性发展的需要,使得:人人都能获得良好的数学教育,不同的人在数学上得到不同的发展。”课程改革走到今天,已经越来越清楚的表明,课改的基本出发点是以发展学生为本,而要做到这一点,就要求我们数学教师的课堂教学活动必须是有效的。换句话说:学生通过数学课堂教学活动,在数学上有提高,有进步,有收获;在认知上,从不懂到 Curriculum Standard (2011 Edition) put forward: “Mathematics curriculum should be committed to achieving the goal of compulsory education training phase, to all students, to meet the needs of individual development of students, so that: everyone can get a good math education, different Have experienced different developments in mathematics. ”As the curricular reforms come to today, it has become clearer and clearer that the basic starting point of curricular reform is to develop student-centeredness. To do this requires us that our math teacher Classroom teaching activities must be effective. In other words: Students through mathematics classroom teaching activities, improve mathematics, progress, harvest; cognitively, never understand