In American universities, more than 60% of the courses in comprehensive universities are generally taught in large classes, and more than 200 people attend classes in the auditorium. Teachers use Mike to lecture, students take notes, and take course notes after class. Finish your homework.

All courses in the College of Arts and Sciences are taught in small classes (/kloc-small classes with less than 0/5 students). Comprehensive universities will introduce the proportion of small classes in detail, which is generally 40%-60%.

The advantage of a comprehensive university is that as long as undergraduates get good grades, they will have direct contact with graduate students' learning methods and professors. It is helpful for future graduate studies. The disadvantage is that learning depends entirely on consciousness. Students with poor self-control are more likely to get low marks and affect their study. The undergraduate graduation rate in the United States is 70%, which means that at most one-fifth of students may not graduate.