Second, the root of the problem is that the school has not prepared all the materials, which leads to the children not having enough time to finish their homework. It is true that the teacher asks them to finish their homework, provided that the children have time to do it. So you can communicate well with the teacher.
Third, if the teacher has no morality to continue to make trouble, he can claim tuition fees. Since he doesn't act, you don't need to give him face. Besides, there are many places to learn.
Fourth, I feel that you should strengthen the supervision of children's learning, try to remind them and urge them to finish their homework. After all, it is the children who take the initiative to make up the lessons.
What did you say?/Sorry?