“规律”是指事物之间的内在的必然联系。“规律”是客观存在的,是不以人们的意志为转移的。但人们能够通过实践认识它,利用它。我们钻研教材的一个重要方面,就是要研究教材的知识规律。这些规律一旦被我们所掌握,就能很好地提高教学质量。例如写48的所有约数,很多教师往往指导学生从小到大一个一个地写,或者不加指导,让学生任意地写,想着什么就写什么。结果很多学生写不全,把有的约数遗漏了。我们通过试卷分析,研究了究竟如何来写一个数的约数,才能写完全、写正确。通过研究,我们发现:一个数的约数是 “Law” refers to the inevitable connection between things. The “law” is objective and does not depend on the will of the people. But people can know it through practice and use it. An important aspect of our study of teaching materials is to study the law of knowledge of teaching materials. Once these rules have been mastered by us, we can well improve the quality of teaching. For example, to write all the divisors of 48, many teachers often instruct students to write one by one from small to large, or without instruction, let students write at will and think of what to write. As a result, many students failed to write some of the divisors. Through the analysis of papers, we study how to write a number of divisors in order to write complete, write correctly. Through research, we find that the number of divisions of a number is