In-depth and high-quality products and topics are lectures. Tell me about the theoretical knowledge systematically. Closed classes are explained by model exams and test questions (there are also some special lectures, but they are not systematic, mainly about complete sets of papers). If you don't attend class, the effect will be even worse.

Last year, I participated in a boutique and a closed class. The two children sitting next to me are in a closed class. The teacher can't keep up with them. There are many things to ask me. If I had attended a class before, these things would be easy to do.

I think the closed class is very helpful to adjust the state and improve the score, but it is best to have a certain foundation before, either sign up for an excellent class, sign up for a special class, or buy a book to study hard. It's a bit of a waste of money to listen to the teacher without doing anything.