This brief is part of the Affirming Equity, Ensuring Inclusion, and Empowering Action initiative. This brief summarizes the research on dual enrollment programs--programs which allow high school students to enroll in college coursework through a partnering college or university--and offers policymakers a strategy to increase college enrollment and attainment via such efforts. Dual enrollment represents a promising lever for increasing educational equity, given its large scale and demonstrated effectiveness for increasing college access and success among its participants. Black, Latinx, and other minoritized students benefit from dual enrollment participation, yet these and other groups underrepresented in higher education often do not have meaningful access to such programs. Strong dual enrollment programs have the potential to raise college enrollment rates among high school graduates and improve college-attainment rates for students who participate. [Eileen and Harold Brown provided additional funding for this series of briefs.]