Prerequisites are one or more requirements, including class standing, that must be satisfied before a course may be taken. The prerequisites for each course, where applicable, are listed in the online class schedule for each semester. Completing all prerequisites before taking a course is important for academic success. The prerequisite course teaches specific materials that are essential for success in higher level courses. Students without the proper prerequisites generally will not be prepared for the course and consequently may encounter academic difficulty. Student registrations are checked randomly prior to the beginning of each semester, and those students who do not have the proper prerequisites are withdrawn from classes.