A prerequisite subject is a course or other requirement that a student must have completed before enrolling in a specific course or program. Prerequisites are important because they prepare students to be successful in a related course by covering information, theories, skills, and vocabulary that they will be expected to know before taking the higher-level course. Prerequisites can be listed on MyUI or in the course information page, and if a course has a prerequisite, it will be listed. If a student has not taken a courses prerequisite, they cannot enroll in that particular course. Prerequisites are often implemented at all education levels to measure student comprehension and preparedness.