Class size varies. Large lecture halls often seat 300 students. A student, however, would not have all classes in a 300-person lecture hall. Lecture classes typically allow for personalization through labs and small group sessions, called recitations, which tend to be about 20 students in size. Only 17% of our classes have over 100 students in them. Also, the further a student moves into his/her major, the smaller the classes tend to be.