This study examines whether the physical location of Pre-K programs--whether in elementary school buildings or stand-alone centers--leads to differences in student outcomes in elementary school. Over the past several decades, public investment in Pre-K programming has burgeoned. According to the National Institute for Early Education Research, 32…

Despite the vast body of research examining the relationship between full-day kindergarten attendance and children's outcomes, little is known about the effects of full-day kindergarten on children with disabilities (i.e., students with 1 of the 13 categories of disabilities recognized under federal law). This study fills this research void by…

Researchers have become increasingly interested in programs' main and interaction effects of two variables (A and B, e.g., two treatment variables or one treatment variable and one moderator) on outcomes. A challenge for estimating main and interaction effects is to eliminate selection bias across A-by-B groups. I introduce Rubin's causal model to…

Recent federal, state, and district policies that have mainstreamed English language learner (ELL) students into general, English-only elementary school classrooms have raised questions among educational stakeholders about the widespread effects of these policies. Most research has focused on the outcomes of ELL students; almost nothing is known…

Over the past decade, several state and federal policies have directed schools to mainstream English Language Learner (ELL) students into English-only instruction classrooms. While there is mixed evidence on the effects of these immersion policies on the ELL students, research examining potential peer effects on their non-ELL classmates is…

The purpose of this study is to examine the role of center-based care and children's school readiness in predicting their first and third grade reading and mathematics achievement. Predictions derived from an opportunity-propensity theoretical framework applied to data from the Early Childhood Longitudinal Study-Kindergarten Class of 1998-99. …