High School Concurrent Enrollment students take college courses while in high school. Concurrent Enrollment students receive the experience of taking a college course to prepare for college success after high school. Concurrent enrollment courses follow the Dine College Academic Calendar and enrollment dates for a variety of classes offered in-person, online, or in a hybrid format. The student must have completed High School Freshman Year and be enrolled in an accredited public, Bureau of Indian Education funded or a private secondary school.