引言作为开场白,在整堂课的教学中有着举足轻重的地位。好的引言,能迅速激起学生对本节课的兴趣,促使思维尽快处于最佳状态,从而使教学呈现良好势态。本文就如何利用课堂引言,培养和激发学生学习化学知识的兴趣,谈一些具体的做法。一、生活事例做引言生活事例源于生活,易于吸引学生的注意力,通过事例,激情引导。如,在《爱护水资源》一节的引言中,我上课起始播放视频《太湖美》,呈现水上有白帆,水下有红菱,水边芦苇青,水底鱼虾肥的美丽图片,播放视频《被污染的水》呈现水中垃圾成堆,工厂污水随意排放,因水污染出现大量的死鱼死虾,这些令人触目惊心的 Introduction As an opening, teaching plays a decisive role in the entire class. A good introduction quickly arouses students’ interest in this lesson and prompts them to be in their best condition as soon as possible so that the teaching is in a good shape. This article discusses how to make use of the introduction of the class, cultivate and stimulate students’ interest in learning chemical knowledge. First, the life of the case to do Introduction Life case from life, easy to attract the attention of students, through examples, passion to guide. For example, in the introduction of “Protecting Water Resources”, I started the video “Taihu Mei” in class and presented a beautiful picture with white sails, underwater red water, reed green waters and fish and shrimp at the bottom. The video “Contaminated Water” shows a pile of rubbish in the water, free discharge of factory effluents, a large number of dead fish and dead shrimp due to water pollution, these shocking