There is still a big difference between college classroom education and high school classroom education. First of all, the educational goals are different. Senior high school teachers try their best to make students master knowledge, do problems and know the answers to questions in class. Although they impart a lot of knowledge, the goal is to enable students to cope with exams, which is called exam-oriented education.
Different:
Compared with this, college education is very different. For example, in my undergraduate normal school, professors impart knowledge mainly to arouse our thinking and feelings, increase our knowledge and improve our teaching skills. There is no fixed answer. Everyone teaches according to their own characteristics, and it feels like quality education.