小学数学课本第八册《数的整除》这一单元,概念比较多,概念的前后联系又比较紧密。为此,教学这一单元时,一定要很好联系学生已有的知识,通过具体事例来讲清概念;对于一些容易混淆的概念,要运用分析、对比和比较的方法来揭示它们的联系和区别;还要注意循序渐进,使学生切实把每一部分内容都学好。1.关于自然数和整数学生在初次接触自然数概念时,往往容 Primary mathematics textbook eighth book “divisibility of the number” of this unit, the concept is more, the context of the concept and more closely. To this end, teaching this unit, we must be good to contact the students have the knowledge, through specific examples to clarify the concept; for some confusing concepts, the use of analysis, comparison and comparison methods to reveal their connection and Differences; also pay attention to gradual, so that students effectively every part of the content to learn. 1. About Natural Numbers and Integers Students tend to be content when they first touch on concepts of natural numbers