在高中物理复习课或习题课中,常遇到有多个物理过程或串连各章知识的综合题。为了帮助学生掌握解题要领,掌握多种题型的解题规律,我们摸索了一种新的教学方法——链式教学法。经过几年实践,证明这种方法确有一定效果。综合题是由单一题综合而成的,解决综合题应从解决单一题及其组合规律着手,为了能让学生从题海中解脱出来,教师首先要从大量试题中萃取出具有一定代表性的试题“组合元”,然后将这些“组合元”按一定的目的、要求和规律组合成一个“习题链”。然后将这个“习题链”上的组合元由浅入深、由易及难地逐步递进,逐个解决。在解决每一问题的同时,注意到它与其它组合元的影响和联系,最后综合成一个完整的解题思路和解题规律,这就叫做链式教学。运用链式教学上课,一节课往往从头到尾就只要讲一个组合题,题意清晰,目标集中,随着条件的变化,不断注入新的信息,思路得到开拓。整个一堂课,层层深入,环环紧扣,重复而不枯燥。一节课上完,能让学 In high school physics review class or exercise class, you often encounter multiple physical processes or series of knowledge in each chapter. In order to help students grasp the essentials of problem solving and master the problem-solving laws of various types of questions, we explored a new teaching method—chained teaching method. After a few years of practice, this method has proved to be effective. The comprehensive question is composed of a single question. Solving the comprehensive question should proceed from the solution of a single question and its combination rules. In order to allow students to escape from the question, the teacher must firstly extract a representative question from a large number of questions. Combine the elements, and then combine these “combination elements” into a “chain of exercises” according to certain purposes, requirements, and laws. Then the combination of elements in this “chain of thoughts” will be gradually entered, deep-drawn, gradually and progressively solved one by one. While solving each question, notice its influence and connection with other combination elements, and finally integrated into a complete problem-solving idea and problem-solving law. This is called chain teaching. The use of chain-type teaching, a class is often from beginning to end as long as a combination of questions, the intention is clear, the goal is concentrated, with the changes in conditions, constantly inject new information, ideas have been opened up. Throughout the entire class, the layers were deep and the rings were tight, repeated and not boring. After a class, you can learn