Senior two is over, and mathematics is basically over. The whole senior three, the new content will end in two months, or one month. I was good at science. Personally, I think math and physics are a little easier to learn, especially math. I don't know what is your starting point for changing teachers, are you worried about the poor level of teachers, or do your children need to take a step closer? I got 136 in the college entrance examination in 2004, but I can't speak Chinese or English. I can give you a suggestion on mathematics. If the child's foundation is ok, it will be slightly higher. If you can't get 120, the main task is to lay a solid foundation for the basic knowledge in the book. Many teachers have been asking students to do test papers, and I have done no more than 15 sets of test papers in senior three. We are doing test papers every day. Because I don't do test papers, I am often talked to by the class teacher. I feel that my knowledge is still relatively solid, so I have made great efforts to check and fill the gaps. If you have a solid knowledge, you can basically reach 130. The college entrance examination score is like 30 points. Therefore, don't expect senior three teachers to start from themselves and consolidate systematic knowledge according to their own level. Plus the teacher's on-demand program, it will be great. Personally, I think that a really good teacher must do a good job in students' basic knowledge. Especially in combing the knowledge system. Let students do test questions all day, and the teachers who explain them are not excellent teachers, but at best they are qualified. Personal opinion, for reference only.