What are the responsibilities of part-time teachers in student custody classes?

I have many years of experience in running a school. The responsibilities of part-time teachers include: for example, what to do before class, making teaching progress plans, teaching plans, preparing lessons, etc. What should be done in class, such as teaching methods, time, writing on the blackboard, answering questions and correcting homework, doing a good job in exam analysis and ensuring teaching quality; What to do after class, such as filling in the teacher's teaching schedule, teaching log, test paper analysis, teacher's teaching summary, etc.