Many courses at NHTI are dependent upon knowledge learned in preceding courses. NHTI requires that students pass all listed prerequisite courses prior to proceeding with courses for which there are prerequisites. Prerequisite courses may be waived only with the prior approval of the head of the department in which they are taught. Such a waiver does not, however, suggest that those prerequisite courses need not be taken, but only that credit for them may be gained at a subsequent time.
Corequisite courses are those that must be taken concurrently (at the same time) with another course, as listed in a particular course description. (Note that with departmental permission, a corequisite course may sometimes be taken in advance of the course for which it is a corequisite.)