But specifically, whether the effect is different varies from person to person. If the child is receptive and willing to study hard, then it is definitely possible to get 5~ 15. If children don't want to learn and don't listen, then even the best teacher is useless. Relatively speaking, Mr. Chun Bo's math scores are OK.

Mr. Chun Bo is experienced in mathematics, and his review and breakthrough methods are for students with good foundation. If you are as poor as I used to be and can't understand the logic of simple methods, I advise you to make every knowledge framework clear first. It's useless to copy mechanically. Teachers can only teach you methods, review depends on yourself, and understanding, practice and consolidation depend on yourself.