To meet minimum admission to a 4 year university, you must complete 15 year-long high school courses with a letter grade of C or better. Keep in mind that taking high school (A-G) courses isn't the only way to satisfy these requirements. You also may meet them by completing college courses or earning certain scores on various acceptable exams. With the exception of math and language other than English, all subject requirements must be met in 9th through 12th grade.