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…

Corequisite remediation, which mainstreams students deemed academically underprepared into college-level courses with additional learning support, is rapidly being adopted by colleges across the nation. This paper provides the first causal evidence on a system-wide corequisite reform, using data from all 13 community colleges affiliated with the…