现实生活中的数学素材是非常广泛的,教师要进行加工、提炼,并从学生的兴趣、爱好、情绪等角度全面分析课本素材与生活素材的联系,找准切入点,根据学生的特点选择并确定一个主题。好的主题能够减轻学生的学习压力,消除学生的心理障碍,诱发学生的积极情感,调动他们参与学习的积极性。好的主题能让学生觉得数学学习亲切、好玩。就像讲故事那样,有一个吸引人的题目,学生会自觉地进入“欲知详情,且听下回分解”的境地。比如,一位教师在教学“数字编码”中“身份证的 In the real life mathematics material is very extensive, the teacher must carry on the processing, the refinement, and from the student interest, the hobby, the emotion and so on the angle comprehensively analyzes the textbook material and the life material contact, identifies the entry point, chooses according to the student characteristic Determine a theme. Good topics can alleviate students’ learning pressure, eliminate students’ psychological barriers, induce students’ positive emotions, and motivate them to participate in learning. Good topics make students feel math learning kind, fun. Just like telling a story, there is an appealing topic where students will consciously enter the position of ”for more information, and listen to the next time.“ For example, a teacher in teaching ”digital coding “ ”ID card