化学对我们认识和利用物质具有重要的作用,宇宙是由物质组成的,化学则是人类用以认识和改造物质世界的主要方法和手段之一,它是一门历史悠久而又富有活力的学科,它与人类进步和社会发展的关系非常密切,它的成就是社会文明的重要标志。中学化学是学好化学的重要阶段,笔者结合自身实践对提高中学化学课堂效率这一问题进行了深入研究。 Chemistry plays an important role in our understanding and utilization of materials. The universe is composed of materials. Chemistry is one of the major methods and means used by mankind to recognize and transform the material world. It is a long and dynamic subject It is closely related to human progress and social development. Its achievements are an important symbol of social civilization. Middle school chemistry is an important stage to learn chemistry, the author combined his own practice to improve the efficiency of the middle school chemistry class conducted an in-depth study of the issue.