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…

Research conducted by the Community College Research Center (CCRC) and others was criticized in an article by Alexandros M. Goudas and Hunter R. Boylan (2012) published in the "Journal of Developmental Education," Volume 36, Issue 1. They raise specific contentions related to the methodology applied in the CCRC studies, the review of…

In this study, the different types of research designs used to assess the impact of prerequisite courses are presented. Supported by an in-depth literature review, the challenges that are faced in the assessment of the impact of prerequisites, from statistical to political, are identified and their pitfalls are pointed out. In particular, the…