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在实际教学中学生对于“规律性”的概念理解很快很好,因为能看到或亲自验证规律产生的过程,用规律定义概念容易理解接受.有些概念是根据教学内容的需要规定的,和已有的知识联系不大,对于“规定性”的概念的理解有难度,需要时间沉淀感悟.初中数学教材中有不少定义是有内涵的但是以规定的形式给出的,教材为了降低难度只是在已有的知识基础上“点到为止”举例后就给出了定义.“点到为止”成了教材的弹性内容,为学有余力的学生发展思维提供了素材,为教师创新教材提供了空间.锐角三角函数定义
In the actual teaching, the students understand the concept of “regularity” very quickly, because they can see or verify the law in person, easy to understand and accept by the law.Many concepts are defined according to the needs of the teaching content, And has little contact with the existing knowledge, understanding of the concept of “regularization ” has difficulty, it takes time precipitation sentiment.Many definitions of junior high school mathematics textbooks are connotation but given in the form of provisions, textbooks In order to reduce the difficulty is only based on the existing knowledge “point to date ” gives an example after the example. “Point to date ” has become the flexible content of the textbook for the development of students have the ability to provide thinking The material provides space for teachers’ innovative teaching materials