In the epidemic situation, the teacher's ability to use information technology applications is the result of the teacher's personal teaching experience and long-term teaching practice. If teachers want to keep growing and continuously improve their online teaching skills, they must start from two aspects: - To enter high quality In the inner world of teaching, the other is a community of teachers made up of peers. In addition to their own teaching experience, teachers can also find their own "shadows" of colleagues and communicate with one another to find out the deficiencies in the use of information technology in the classroom and then to discuss them together.