This article assesses the likely generalizability of educational treatment-effect estimates from regression discontinuity designs (RDDs) when treatment assignment is based on academic pretest scores. Our assessment uses data on outcome and pretest measures from six educational experiments, ranging from preschool through high school, to estimate…

Understanding digital supports for early learning is paramount for school readiness and later mathematics learning. We present results from a randomized control trial evaluating a digital app (Measure Up!) and a parent companion app (Super Vision) designed to teach children measurement concepts, a skill that many teachers do not feel comfortable…

Coviewing is a commonly recommended practice, but little is known about how coviewing impacts children's educational media viewing experience. We investigated how coviewing impacts attention and comprehension of educational media, as well as the role of baseline vocabulary in understanding these associations. Eighty-three preschoolers viewed two…

We examine the contributions of the environmental context on cognitive development in a representative sample of children (24-59 month-olds) in Nicaragua. Multivariate regression models revealed that children who experienced high levels of structure in the home, encountered more social interaction, and were enrolled in early education programs,…

The purpose of this cluster randomized group study was to investigate the effect of multitiered, dual-language instruction on children's oral language skills, including vocabulary, narrative retell, receptive and expressive language, and listening comprehension. The participants were 3- to 5-year-old children (n = 81) who were learning English and…

Purpose: Many preschoolers, especially those from low income households, would benefit from instruction to enrich their vocabulary and language repertoires. Yet, explicit instruction of vocabulary and language skills generally occurs infrequently in early childhood education settings. This study investigated the additive effects of teacher-led,…

Purpose: Preschoolers' phonological awareness (PA) and alphabet knowledge (AK) skills are two of the strongest predictors of future reading. Despite evidence that providing at-risk preschoolers with timely emergent literacy interventions can prevent academic difficulties, there is a scarcity of research focusing on Latinx preschoolers who are Dual…

Both recent evidence and research-based early mathematics curricula indicate that repeating patterns--predictable sequences that follow a rule--are a topic of major importance for mathematics development. The purpose of the current study was to help build a theory for how early repeating patterning knowledge contributes to early math development,…

Research supports small-group emergent literacy intervention to boost preschool children's early skills and provide a solid foundation for continued literacy learning. Although such interventions are increasingly available to preschool teachers, we have limited understanding as to how these are implemented under routine conditions in authentic…

Theory and research have demonstrated the importance of teacher scaffolding to facilitate effective classroom conversations during shared book reading. When teachers scaffold conversations, young students can develop language skills more quickly. The authors describe a scaffolding framework and findings from research on how open-ended questions…

Professional development (PD), which includes coaching, has demonstrated the capacity to affect preschool teachers' use of evidence-based practices. The present study explored how coaches facilitated conversations within practice-based coaching (PBC) partnerships. A direct behavioral observation coding system was developed to investigate: (1) the…

This study examined the association between two implementation factors, nurse-reported intervention adherence and self efficacy, and children's outcomes in school nurse-delivered anxiety interventions. Data were collected in a pilot randomized controlled effectiveness trial with 54 children and 21 school nurses. Nurses implemented either a…

Purpose: Many children begin school with limited vocabularies, placing them at a high risk of academic difficulties. The goal of this study was to examine the effects of a vocabulary intervention program, "Story Friends," designed to improve vocabulary knowledge of at-risk preschool children. Method: Twenty-four early-childhood…

The present study considered the ways in which interactional quality in the classroom and teacher--child relationships independently and synergistically shaped the early academic, social-behavioral, and executive function outcomes of 1,498 preschoolers from low-income families from a large, culturally, and linguistically diverse county. The…

Purpose: This paper describes the iterative development of a home review program designed to augment vocabulary instruction for young children (ages 4 and 5) occurring at school through the use of a home review component. Method: A pilot study followed by two experiments used adapted alternating treatment designs to compare the learning of…