The Kindergarten Hotspot: Literacy Skill Convergence Between Boston Prekindergarten Enrollees and Nonenrollees.

Preschool improves children's kindergarten readiness, but the cognitive outcomes of preschool enrollees and nonenrollees tend to converge partially or fully in elementary school. In older programs, most of this convergence occurs in kindergarten (Li et al., 2016), but evidence from today's programs is sparse. Using data on 4,971 children who applied to the Boston Public School Prekindergarten program and a quasi-experimental approach, we examine convergence in kindergarten through third grade (K-3) literacy outcomes of prekindergarten enrollees and nonenrollees. Consistent with previous literature, most of the convergence in K-3 literacy outcomes occurred in kindergarten. Our findings suggest that detailed investigations into the kindergarten teaching and learning context may be particularly important for solving the widely noted preschool convergence pattern.

The Effects of Enrolling in Oversubscribed Prekindergarten Programs Through Third Grade.

This study leverages naturally occurring lotteries for oversubscribed Boston Public Schools prekindergarten program sites between 2007 and 2011, for 3,182 children (M = 4.5 years old) to estimate the impacts of winning a first choice lottery and enrolling in Boston prekindergarten versus losing a first choice lottery and not enrolling on children's enrollment and persistence in district schools, grade retention, special education placement, and third-grade test scores. There are large effects on enrollment and persistence, but no effects on other examined outcomes for this subsample. Importantly, children who competed for oversubscribed seats were not representative of all appliers and almost all control-group children attended center-based preschool. Findings contribute to the larger evidence base and raise important considerations for future prekindergarten lottery-based studies.