To improve the quality of chemistry teaching, we must give full play to teachers' leading role and students' enthusiasm according to students' age and characteristics of chemistry specialty, so that students can acquire systematic and solid chemistry knowledge and improve their ability to analyze and solve problems.

1, the concept should be clear.

The concept of chemistry is the abstraction and generalization of chemical phenomena. Each concept has a specific content and scope of application, and concept teaching is very important. Therefore, pay attention to the meaning of concepts: pay attention to the relationship between concepts; Attach importance to the role of concepts; Highlight the key words and sentences in the concept and remember them with examples.

2, the experiment should be clear

Vivid and interesting chemical experiments are important factors to guide students' interest in learning, and are also conducive to cultivating students' observation ability, operation ability and logical thinking ability. For example, in the oxygen making experiment, students should first be clear about the equipment, drugs used, reaction conditions, collection methods, gas inspection and so on. Then let students observe the phenomenon that potassium chlorate and manganese dioxide produce a large number of bubbles when heated, and then introduce the reaction principle and equation.