In order to graduate, students require twenty-four credits and a grade point average (GPA) of at least 2.0. They must also complete one hundred hours of community service by the end of their senior year. The academics at Columbus are based on a phasing system: Phase 2 classes are for the academically challenged who require more time to absorb a given subject, Phase 3 classes are for average students, Phase 4 refers to honors classes for the academically gifted, and Phase 5 refers to Advanced Placement (AP) classes, which have a college-level format and where academically motivated students have the opportunity to gain college credit should they earn the proper score on the AP exam. Depending on a given phase of a class, a student will earn a certain number of points, which are then weighted and averaged to generate a student's GPA, the average GPA being a 3.2. Columbus has more students taking AP classes than any other Catholic school in Miami-Dade County and their passing averages on AP exams are five times higher than the state and national averages.