First, write down the teaching objectives. Now is the stage of curriculum reform. There are three parts in the classroom: knowledge, ability, emotional attitude and values. Then analyze the teaching materials: key and difficult points, teaching AIDS, teaching methods and teaching process, and divide them into detailed cases and simple cases. Imagine how to say every sentence in a detailed case. In a simple case, it is very troublesome to just write down the schedule and the activities of each part of the teachers and students.