4000 level: extensive use of primary literature; suitable for upper level undergraduates or first year graduate students. 3000 level: requires 2000-level prereqs and "bridging" the 2000-4000 level gap. Senate policy:
3xxx Courses primarily for undergraduate students in their third year of study.
4xxx Courses primarily for undergraduate students in their third or fourth year of study; graduate students may enroll in such courses for degree credit.