Across the United States, community colleges offer millions of students an open-access, low-cost postsecondary education. However, of the students who enroll in community college hoping to earn a credential or transfer to a four-year institution, only about half achieve their goal within six years. For students who enter college needing…

This paper presents research that explores similarities and differences across six randomized controlled trials of learning communities in community colleges that were conducted by MDRC and the National Center for Postsecondary Research. Five of these studies track students' progress in the program semester and two follow-up semesters, and one…