Delays in meeting math requirements can impede the progress among community college students who aspire to earn a baccalaureate degree. To investigate this issue, we used state administrative data from Texas to examine the prevalence and predictors of math course repetition and how math course repetition predicts transfer students' outcomes. More than a third of community college transfer students take additional introductory mathematics coursework despite having fulfilled the requirement-a phenomenon we referred to as "horizontal repetition"-and one sixth of community college students take redundant coursework within a given mathematics course sequence, referred to as "vertical repetition." Using regression models controlling for student backgrounds, academic experiences, and institutional fixed effects, we found that horizontal repetition was linked to lower GPA and, among degree recipients, increased time to degree and excess credits. Vertical repetition was negatively associated with GPA and degree completion and positively linked to increased time to degree and excess credits. Location of course repetition shaped student outcomes, where math course repetitions occurring at the university appear to drive many of the negative associations between both horizontal and vertical repetition and student outcomes. As community colleges and universities across the country consider the efficacy of course sequences and transfer pathways, our research offers insights into patterns and implications of course repetition in core math courses.
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