Lower-and Upper-Division Courses

All University courses are assigned numbers which designate their general level of difficulty. Courses numbered 100 to 299 are lower-division courses and are generally taken by freshmen and sophomores. Courses numbered 300 to 499 are upper-division courses and are generally taken by juniors and seniors, usually after they have taken lower-division courses in the department. Upper-division courses often have prerequisites. Courses numbered 500 and above are graduate level courses and are open to undergraduate students only under special conditions.