现行中学化学教材中，学生分组实验就其侧重点而言，可分为三种主要类型，即操作型、验证型、探索型。教师可根据其侧重点分别采取示范型、点破型、协助型方法进行现场指导，力求使分组实验达到最佳效果。1．操作型为主的实验如化学实验的基本操作中，配制一定体积摩尔浓度溶液 In the current middle school chemistry textbooks, the grouping experiments of students can be divided into three main types in terms of their focus: operation type, verification type, and exploration type. Teachers can use their demonstration methods, point-breaking models, and assisted methods to conduct on-site instruction according to their focus, and strive to achieve the best results for group experiments. 1. Operation-based experiments such as the basic operation of chemical experiments, the preparation of a certain molarity solution