The academic year is at least 180 days divided into two semesters. Courses are either taught on a 4x4 or an A/B schedule. For courses taught on a 4x4 schedule, students receive a final grade and one standard unit of credit at the end of the semester for each course successfully completed. For yearlong courses taught on an A/B schedule, students receive a final grade and one standard unit of credit at the end of the school year for each course successfully completed. There are some courses designed to be a semester in length and taught on an A/B schedule, students receive a final grade and one-half credit at the end of the semester for each course successfully completed.