《数学课程标准》指出:“有效的数学活动不能单纯地依赖模仿和记忆,动手实践、自主探索和合作交流是学生学习数学的重要方法。”《标准》还指出:教师是引导者、组织者、激励者。教学理论与实践也清楚地告诉我们,教学的成败,归根到底要看学生自身的努力,所有教学效果都是以学生是否参与、怎样参与、参 The Standard of Mathematics Curriculum states: “Effective mathematics activities can not rely solely on imitation and memory. Hands-on practice, self-exploration and cooperation and exchange are important ways for students to learn mathematics.” “Standards” also states that teachers are the guides, Organizer, motivator. Teaching theory and practice also clearly tell us that the success or failure of teaching, in the final analysis depends on the students’ own efforts, all teaching effects are based on whether students participate, how to participate,