1. Full preparation: First, watch the video of the open class carefully, sort out the key points, difficulties and mistakes, make teaching objectives and plans, and prepare relevant teaching materials and tools.

2. Course content analysis: analyze the content of the open class, and explain the content concisely in the process of explanation, so that students can have a clear understanding of concepts, principles and methods.

3. Flexible use of teaching methods: According to students' age characteristics, cognitive ability and study habits, adopt various teaching methods and forms, such as teacher demonstration-student imitation, game teaching, group cooperation, etc. Let children stay interested and participate in interaction.

4. Assessment of mastery: After the course, let students review and summarize what they have just learned through self-examination and group question and answer, and give timely feedback and guidance to help students master knowledge points.

5. Encourage students: In the teaching process, we should praise and encourage students in time, so that they can have a sense of accomplishment and self-confidence and achieve better results in math learning.