High school /college courses study

Students who take college courses while in high school are more likely their their peers to succeed in college. The sources more benefit males, students from low-income families and academic strugglers. Duel-enrollment programs, allowing students to take college courses for both HS and college credit, have become more popular.
Community College Resource Center. (2007). Postsecondary achievement of participants in duel enrollment. New York: Author.
http://ccrc.tc.columbia.edu