This is a question of learning methods. It should be useful if students adapt to the rhythm and way of the teacher's class. Anyway, I have no feeling about the emperor's class, which wastes money and time. I think it's best to find a school teacher to make it up. It is best to hire a teacher with a good reputation. Of course, the investigation is very strict now, and it is not necessary to ask a small class to make up for it. In addition, ask your child and his teacher how they feel about the changes in students. If they feel nothing, then continue to change teachers.