《数学课程标准》指出:“数学学习要从学生的已有生活经验出发。”这种教学理念强调了学生学习数学要有亲历与探索的过程,实际上这种过程,既是亲历的过程、探究的过程,也是学习的过程、内化的过程。巧妙设疑,把学生引入认知冲突之中,激起学生的学习欲望。比如,在教学“圆的周长”时,我先引导学生理解了“围成圆的曲线的长,叫做圆的周长”这一概念后,提问:“请大家拿出学具盒中的纸圆,6人组成一个学习小组,想办法量出纸圆的周 The standard of mathematics curriculum states: ”Mathematics learning should start from the student’s existing life experience.“ This teaching philosophy emphasizes that students have to experience and explore mathematics in mathematics. In fact, this process is both a process of being experienced , To explore the process, but also learning process, the process of internalization. Cleverly set suspicion, the students into the cognitive conflict, arouse students’ desire for learning. For example, when teaching ”Circumference of Circles,“ I first guide students to understand the concept of ”the length of a circle formed by a circle, called the circumference of a circle.“ After asking: ”Please take out Learning paper box in the paper circle, 6 people to form a learning group, trying to measure the amount of paper out of a week