“生物的遗传和变异”是中师生物学教材中的重点和难点,“分离规律”则是本章教学的突破口,也是这一章内容的基础.传统授课法,都是教师讲授经典的孟德尔实验后,总结分离规律的实质,由于缺乏直观性,加上内容本身抽象难懂,新概念、新术语又多,学生对知识的接受是被动的,所以,课后总有一部分学生觉得模糊不清.如何将抽象的内容变得具体而直观,使学生易于接受,便成了本节教学的关键.为此,我在近几年的教学实践中,不断尝试用调查法来辅助教学,收到了很好的效果.所谓调查法即通过填调查表、谈话、调查等方式了解某事物的某个方面的实际情况,从而发现存在问题,概括出规律性的内容的一种方法.在教学中,选择最有说服力的调查对名象 “Biology of genetics and variation” is the key and difficult point in the teaching of biology textbooks for middle school students. “Separation law” is the breakthrough point for the teaching of this chapter and is also the basis of the contents of this chapter. Traditional teaching methods are the classic teaching of Mendelian teachers. After the experiment, the essence of the separation law was summarized. Due to the lack of intuitiveness, the content itself is abstract and difficult to understand, there are many new concepts and new terms, and students’ acceptance of knowledge is passive. Therefore, after the class, some students feel that they are not vague. Qing, how to make the abstract content concrete and intuitive, so that students are easy to accept, has become the key to teaching in this section. For this reason, in the teaching practice in recent years, I have constantly tried to use the investigation method to assist teaching. The results are very good. The so-called survey method is to find out the problems of a certain aspect of something by filling in survey forms, conversations, surveys, etc., so as to discover problems and summarize a method of regular content. , choose the most convincing survey of the name