Developed in response to concerns that too few students were enrolling and succeeding in postsecondary education, early college high schools are small schools that blur the line between high school and college. This article presents results from a longitudinal experimental study comparing outcomes for students accepted to an early college through a lottery process with outcomes for students who were not accepted through the lottery and enrolled in high school elsewhere. Results show that treatment students attained significantly more college credits while in high school, and graduated from high school, enrolled in postsecondary education, and
Estimating treatment effects for subgroups defined by post-treatment behavior (i.e., estimating causal effects in a principal stratification framework) can be technically challenging and heavily reliant on strong assumptions. We investigate an alternative path: using bounds to identify ranges of possible effects that are consistent with the data. This simple approach relies on fewer assumptions and yet can result in policy-relevant findings. As we show, covariates can be used to substantially tighten bounds in a straightforward manner. Via simulation, we demonstrate which types of covariates are maximally beneficial. We conclude with an analysis of a multi-site experimental study of Early College High Schools. When examining the program's impact on students completing the ninth grade "on-track" for college, we find little impact for ECHS students who would otherwise attend a high quality high school, but substantial effects for those who would not. This suggests potential benefit in expanding these programs in areas primarily served by lower quality schools.
This article utilizes mixed methods—a lottery-based experimental design supplemented by qualitative data—to examine college readiness within an innovative high school setting: early college high schools. Early colleges are small schools that merge the high school and college experiences and are targeted at students underrepresented in college. Results show that early college students are more likely to have successfully completed the courses they need for entrance into college; early college students also graduated from high school at a higher rate. Interview and survey data show that early college students are generally considered similarly prepared to more traditional postsecondary students. The interview data also provide detailed descriptions of the kinds of strategies the schools use to support college readiness. The article concludes with lessons learned for secondary school principals.
Early colleges are a new model of schooling in which the high school and college experiences are merged, shortening the total amount of time a student spends in school. This study uses a lottery-based experimental design to examine the impact of the model on longer term outcomes, including attainment of a postsecondary credential and academic performance in 4-year institutions. Results show that a significantly higher proportion of early college students were attaining postsecondary credentials. The results also show that early college students were completing their degrees more rapidly but that their performance in 4-year institutions was still comparable with the control students.
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