Actually, it's also about school. Some schools are strict in checking people in class and can't skip classes, but some schools are more relaxed. It depends on the teacher. If the teacher pays attention to you, he will ask you some questions by name in class. However, attending high school is not a concept at all. Relatively speaking, it is relatively easy. This is a non-English major. If you are specialized in English, it is not clear.

The difference is that college teachers don't tell you as detailed grammar and sentence patterns as high school teachers do. ...

University teachers are more casual in class. If you want to go to college to learn English well, you should teach yourself more. No, you can ask the teacher.