This article provides the first causal evidence of a system-wide corequisite reform in Tennessee, which mainstreams underprepared students into college-level courses with concurrent support. Using regression discontinuity and difference-in-regression-discontinuity designs, we find that, for those on the margin of college level, students placed…

For many students, developmental education is the largest obstacle to college success, hindering progress before they ever enroll in a college-level course. Postsecondary practitioners and researchers have been re-examining and challenging many traditional elements of developmental education from placement strategies to the sequence of courses…