摘要：良好的开端是成功的一半。一出戏要想吸引观众的目光必须有引人入胜的序幕；一出好的交响曲要有优美的序曲；一堂成功的化学课则必须有一个精彩的导入。新课的导入是课堂的起始环节，虽然所占时间比较少，但它是教学过程的重要环节，是一节课成功的起点和关键。教师如果能够设计出构思巧妙，想象奇特的导入方式则可以深深抓住学生的注意力，激发学生的学习兴趣，产生学习动机，从而达到良好的教学效果，因此起着至关重要的作用。导入没有固定的模式，针对不同的教学重难点、不同的教学目标，其导入方式都是有所侧重，不尽相同的。那么什么样的导入方法才能吸引学生的注意力，让学生用最短的时间进入课堂学习的最佳状态呢？下面我将依据自己在教学实践中的具体事例进行探讨。

关键词：课堂导入；作用；原则；方法

Abstract: A good beginning is half of success. A play in order to attract audiences’ attention must have a fascinating prelude. A good symphony must have a beautiful prelude. A successful chemistry class must have a wonderful import. The introduction of the lesson is the initial link of the class. Although it accounts for less time, it is an important link of the teaching process, it is the key of a successful class. If the teacher can design ingenious introduction, imagine peculiar way to import new lesson can deeply caught the attention of students, stimulate students’ interested in learning, resulted in learning motivation to achieve good teaching results. Therefore it plays a crucial role. Import has no fixed pattern, according to different teaching points, different teaching goals, using different methods to import. But which kind of import can attract the attention of students? Which can let students use the shortest time to get into the best condition of the class learning? Now I will discuss specific examples based on my own teaching practice.

Key Words: the introduction of lessons；effect,；principle；method