The current study examined the contexts in which a preschool teacher professional development intervention was more versus less effective in improving student outcomes. We used a fixed intercept, random coefficient (FIRC) modeling approach to explore the contextual characteristics inside and outside school walls that predicted differential…

This study examines the efficacy, cost, and implementation of an integrated science and literacy curriculum for kindergarten. The study was conducted in a large urban district and included 1,589 students in 71 classrooms in 21 schools. The research includes a multi-site cluster-randomized controlled trial and mixed-methods cost and implementation…

The One-Village-One-Preschool (OVOP) initiative aims to guarantee early childhood education (ECE) to all children in high-poverty villages in China. A challenge to policymakers is to balance expanding the scale with lengthening service duration. Following 23,775 children from preschool (4-year-old) to fourth-grade (10-year-old) in a…

Since the standards-based education movement began in the early 1990s, mathematics education reformers have developed and evaluated many interventions to support students in mastering more rigorous content. We conducted a systematic review and meta-analysis of U.S. PreK-12 mathematics intervention effects from 1991 to 2017 to study sources of…

Childhood socioeconomic status (SES) is associated with persistent academic achievement gaps, which necessitates evidence-based, scalable interventions to improve children's outcomes. The present study reports results from a replication and extension of a family-based training program previously found to improve cognitive development in lower-SES…

This paper examines the child development outcomes of two cohorts of children who were exposed to the same intervention at different points in time. One cohort was eligible to access playgroups during the first year of a five-year project cycle, beginning at age four. The other cohort became eligible to access these services during the third year…

This meta-analysis reviewed research between 2012 and 2018 focused on technology-assisted second language (L2) vocabulary learning for English as a foreign language (EFL) learner. A total of 45 studies of 2,374 preschool-to-college EFL students contributed effect sizes to this meta-analysis. Compared with traditional instructional methods, the…

The sustaining environments thesis hypothesizes that PreK effects are more likely to persist into later grades if children experience high-quality learning environments in the years subsequent to PreK. This study tests this hypothesis using data from a statewide PreK randomized experiment in Tennessee that found positive effects at the end of PreK…

Though there is an expanding field of research on public prekindergarten, there is a relatively little comprehensive investigation into what public prekindergarten costs. We address some of the absences in the literature by analyzing public-sector expenditures for the city of Boston's public prekindergarten program, a particularly high-quality…

This randomized controlled trial examined effects of the MyTeachingPartner-Math/Science intervention on the quality and quantity of teachers' mathematics and science instruction, and children's mathematics and science outcomes in 140 pre-kindergarten classrooms. Teachers participated in the intervention for two years with consecutive cohorts of…

Student absenteeism is a widespread and critical issue in early childhood education. Current efforts to reduce student absenteeism in both preschool and K-12 settings have largely been family- and parent-focused interventions. Yet, interventions targeting teachers and schools may similarly be effective tools to improve student attendance. We…

Research-based instruction is necessary to support students' reading development, and professional development (PD) is a critical avenue to ensuring high-quality instructional practices. To date, there has been no comprehensive review focused on the effects of teacher PD on student reading achievement. As such, the purpose of the present…

Public preschool programs require the use of a research-based, whole-child curriculum, yet limited research examines whether curricula influence classroom experiences and children's development. We use five samples of preschool children to examine differences in classroom processes and children's school readiness by classroom curricular status…

Curricula are one of the most widely used educational inputs, yet few are developed and evaluated scientifically with a dearth of programs targeting academic language. This manuscript describes an iterative approach to the development of a tiered academic language curriculum supplement for prekindergarten (pre-K) and kindergarten (K) students. A…

We assessed the impacts of a teacher professional development program for public and private kindergartens in the Greater Accra Region of Ghana. We examined impacts on teacher professional well-being, classroom quality, and children's readiness during one school year. This cluster-randomized trial included 240 schools (teachers N = 444; children N…