Time: A class in senior high school generally does not exceed 1 hour (40 minutes or even less in most places), while college courses generally need 100- 120 minutes, and a few even need 3-4 hours. As long as the high school curriculum is serious and the homework is completed on time and with good quality, there is basically no problem. College courses pay more attention to methods and your schedule. Classroom learning is only a part of the university, and the proportion is far less than that of high school. In senior high school, 7:00-23:00 is basically the prime time for study. In addition to working hours and proper homework hours, universities need to do many other things most of the time: soak in the laboratory, do projects, go out for activities, join student unions, youth league committees, participate in competitions and so on. These all need your time.