Students must register on their own campus for courses open to them in the other Claremont Colleges. Some off-campus courses require written approval or permission slips. All full semester courses on the other campuses receive 3 units of credit (except science courses for which a three-hour lab per week is indicated in the catalog—these receive 4 units). Half semester courses receive 1.5 units of credit except music performance classes, which receive 1 unit of credit. PE courses receive no unit credit.