Please tell me your opinions about classes limited the size between 18 and 20 students?(advantages&disavantage

Well, I went to a school that had 12-15 students at a time and 3 teachers. Most of the time teachers would sit with you if you needed some extra help. This is good. But I’ve been in classes with really bad teachers and they wouldn’t teach or help. I don’t think that the class size is the issue. I think depends on the teacher itself. A good teacher can teach 2, 4, 18, 25, 100+ students at any time.