一、研究目的通过观察蟾蜍的变态发育过程 ,提高学生的观察、分析和思考问题的能力以及操作实验能力和创造能力 ,使学生了解生物与环境的关系 ,培养学生热爱家乡、热爱祖国的爱国主义思想。二、研究方法本项研究采用分组法 ,即把参加实验的学生分为四组 ,每组负责一项实验。定 I. Research Objectives By observing the metamorphosis development process of crickets, students’ ability to observe, analyze, and think about problems, as well as the ability to operate experiments and creativity, students can understand the relationship between biology and the environment, and cultivate patriotism in which students love their hometown and love their motherland. thought. Second, the research method This study uses grouping method, that is to participate in the experiment students are divided into four groups, each group is responsible for an experiment. set