First, briefly review what you learned in the previous lesson Learn basic and everyday expressions: Teach some basic sign language expressions, such as greetings, introduce yourself, express simple needs, etc., so that students can use sign language to communicate in daily life. Let students understand that sign language is not only a language, but also a cultural expression. These contents can help students build up their basic understanding and application of sign language. Of course, the specific content of the sign language class will be adjusted according to the student's level and course schedule.