课堂教学往往由几个固定的环节所组成,他们分别是导入环节、新授课环节、巩固知识环节,以及结课环节,其中导入环节和结课环节是一节课的开头和结尾。因此,在课堂教学中,这两个教学环节质量往往对整节课的质量都有重要的影响。教师不但要重视课前导入技巧的使用,而且在一节课即将结束之际要懂得恰当地利用结课的艺术为课堂教学划上一个完满的句号。在本文中,作者结合着自己在化学课堂教学中的一些教学实践体会,总结和分析了课堂教学中常用的几种导入和结课的方式,希望能够在有效的导入和结课的带动之下提高整节课的教学水平。 Classroom teaching is often composed of several fixed links, which are the introduction link, the new instruction link, the consolidation of knowledge link, and the closing link. The introduction link and the closing link are the beginning and the end of a class. Therefore, in the classroom teaching, the quality of these two teaching links often has an important influence on the quality of the whole class. Teachers should pay attention not only to the use of pre-class introduction skills, but also to draw lessons from classroom art when the lesson is coming to an end. In this article, the author combines some of his own teaching practice in chemistry classroom teaching, summarizes and analyzes several commonly used methods in classroom teaching, and hopes to be able to effectively guide and finish the lesson Improve the teaching level of the whole class.