通过调查、分析与阅读大量文献,本人深入学习了关键期理论,认真分析了当前中学化学的现状,对中学化学教学关键期作了一定的研究,认为中学化学教学过程中存在关键期。这些关键期表现在义务教育九年级化学的启蒙阶段、初高中衔接与转折时期、高中化学必修模块与各选修模块衔接阶段与高三全面复习升华阶段。 Through investigating, analyzing and reading a large number of literatures, I deeply studied the critical period theory, carefully analyzed the current status of middle school chemistry and made some research on the critical period of chemistry teaching in middle school. I think there is a critical period in the process of chemistry teaching in middle school. These key periods are manifested in the ninth phase of compulsory education chemistry enlightenment phase, the convergence and turning point of the first high school, the high school chemistry module and the elective module convergence phase with the third year of a comprehensive review of the sublimation stage.