一、教材的定义教材是教学所用的一切材料,包括教学大纲、教科书、讲义、参考书、教学辅助材料等。本研究主要是对教科书的分析。教材的具体内容由事实、概念、原理及它们的内在联系构成。《美国高中主流<生物>教材的概念教学》中,着重介绍了概念教学的程序和特点。教材中的原理指已经被验证了的、公认的、不需要在加以论证的命题,包括公理、定理、定律,等等。教材内容的本质是内在联系,它是事实、概念和原理之间关系的 First, the definition of textbook Teaching materials are used in teaching all materials, including syllabus, textbooks, handouts, reference books, teaching aids and so on. This study is mainly about textbook analysis. The specific content of the textbook consists of facts, concepts, principles and their internal relations. “Conceptual Teaching of Mainstream Biology Textbooks in American High Schools” focuses on the procedures and features of concept teaching. Principles in textbooks refer to validated, accepted propositions that need not be demonstrated, including axioms, theorems, laws, and so forth. The nature of the textbook content is an intrinsic link, it is the relationship between facts, concepts and principles