I want to know what grade your child is in. Personally, I think summer vacation is mainly about summing up, checking for leaks and filling gaps, and then learning new lessons next semester. If we have to evaluate the teacher's teaching, it is nothing more than two aspects: 1, whether the teacher is serious and responsible in class at ordinary times, whether the preparation before class is sufficient, and whether the teacher gives answers after class. 2. The most direct thing is the exam. Take a test paper from the latest course and let the children do it. Just look at the score.