It must be learning and thinking! ! ! In fact, if you don't like the confusion of learning and thinking, it's also good ... In fact, most of the extracurricular classes are still in the two schools of learning, thinking and puzzle, and the teacher speaks well. I am a senior three now, and most people in my class also attend these two extracurricular classes. I suggest you take them with you. Because some teachers in other extracurricular classes can't guarantee, I have been puzzled by research and thinking for nearly 5 years ... teachers are definitely better than other places.