本文根据认知发展领域的建构主义教学原理,针对当前物理习题教学中的盲目、杂乱、过量,形似题目一错再错,相近模型模糊不清的问题,提出在习题教学中实施比较教学法.根据需要强化的知识点或物理方法,通过四种不同的途径对原题进行比较拓展教学,在原题与拓展题的比较、辨别和综合中,完成知识结构的同化和顺应过程,建立新的平衡 According to the teaching principle of constructivism in the field of cognitive development, aiming at the problems of blind, messy, overmuch, repetitive and error-prone in the teaching of physical exercises, the similar model is ambiguous. According to the need to strengthen the knowledge point or physical methods, through four different ways to compare the original title to expand teaching, the original title and the expansion of the comparison, discrimination and synthesis, the completion of knowledge structure assimilation and adaptation process, the establishment of a new balance