1. Prepare before class. The online mathematics course of Shanghai Science Edition in junior middle school is limited by the teaching form. Every online course should have clear teaching objectives. Teachers should not only dig deep into the teaching materials, but also analyze the learning situation and determine the key and difficult points in combination with the characteristics of students.

2. Teacher-student interaction. With the help of multimedia, arrange some ways suitable for network interaction, so that students can have activities in the whole class. The following forms can be adopted, such as: network teacher, answering questions, etc.