教无定法，却有定体。所谓“五环节”，即把自然的课堂教学结构大体分为“创设情景———引导探索———师生研讨———验证结论———实习作业”这五个教学环节。ａ．创设情境。这一教学环节的主要任务是提出问题，创设情境，激发学习兴趣。其目的是架设新旧知识的桥梁，为学 Teaching no law, but there are fixed. The so-called “five links”, that is, the nature of the classroom teaching can be broadly divided into “the creation of scenarios - to guide the exploration - teachers and students to discuss - verify the conclusions --- internship” these five teaching links. a. Create a situation. The main task of this teaching session is to ask questions, create situations and stimulate interest in learning. Its purpose is to bridge the old and new knowledge for learning