At the time of grading, schools are randomly assigned, and students with average grades at the time of admission are placed in classes. There are several classes. I want to take elective courses in the whole school and take them with students from other colleges. There are about four or five classes. There are also elective courses in your college, and there are about three or four classes in one college. Usually there is one English class and two math classes, and there are almost 30 students in one class.