在教学实践中,教师要做的一项重要工作就是处理教材,原因是教材只提供了教学可能的起点,教师需要找到适合于自己学生学习的现实的起点。教材处理的依据应该是:数学知识发生发展的脉络,学生的已有知识经验,学生的思维发展规律。只有科学整合这些因素才能合理地处理教材,有效地使用教材。 In teaching practice, one of the important tasks to be done by the teacher is to handle the textbook because the textbook only provides the starting point for teaching and the teacher needs to find a starting point for the reality that suits his students’ learning. Teaching materials should be based on the following: the development of mathematical knowledge context, the students have the knowledge and experience, the development of thinking of students. Only by integrating these factors scientifically can we reasonably process the teaching materials and use the teaching materials effectively.