For students, we must carefully consider enrolling in classes. Tens of thousands of dollars is not generous, but it is really expensive. Is it useful? Yes, it will be very useful if you meet a teacher who really teaches well. I have to admit that the teaching level of the famous teachers in the organization is really excellent, and there will be a feeling of awakening in class. But no matter how hard the teacher speaks, the key is to learn by yourself, otherwise you will only do problems in class.
For students who want to sign up for classes, it is actually possible and useful to be willing to spend money to sign up for classes. If they think the teacher is not good at speaking, they should give their opinions immediately, so they must be able to receive knowledge from the teacher and be good teachers for a long time.