A socioeconomic status (SES)-related achievement gap in mathematics emerges prior to school entry, and increases in elementary school. This gap makes implementation of demanding mathematics standards (e.g., the Common Core State Standards) an ongoing challenge. Early educational intervention is a strategy for addressing this challenge. A…

The current paper reports long-term treatment impact estimates for a randomized evaluation of an early childhood intervention designed to promote children's developmental outcomes and improve the quality of Head Start centers serving high-violence and high-crime areas in inner-city Chicago. Initial evaluations of end-of-preschool data reported…

During the fall of the 2016-17 school year, first, second, and third grade students in six elementary schools -- two in St. Paul and Eagan, Minnesota, and four in Bedford County in the Piedmont region of Virginia -- were assigned to take part in randomized efficacy trials carried out for the purpose of rigorously evaluating the impact of…

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…

The purpose of this study was to examine the hypothesis that helping preschoolers learn words through categorization may enhance their ability to retain words and their conceptual properties, acting as a bootstrap for self-learning. We examined this hypothesis by investigating the effects of the World of Words instructional program, a supplemental…

Social-emotional competence is an important determinant of school readiness. School readiness, in turn, sets the stage for school success. There is clear longitudinal evidence that school success, attachment and bonding to the schooling process, and full engagement of schooling can, in combination, operate as a protective factor against a host of…

This quasi-experimental study evaluated the effects of a supplementary preschool classroom music and movement curriculum on Head Start children's language skills. The curriculum consisted of sequenced music and movement activities conducted by outside interventionists. The evaluation compared the language skills of children attending either…

This report addresses the following four questions by reporting on the impacts of Head Start on children and families during the children's preschool, kindergarten, and 1st grade years: (1) What difference does Head Start make to key outcomes of development and learning (and in particular, the multiple domains of school readiness) for low-income…

Forty-four Head Start classrooms were randomly assigned to enriched intervention (Head Start REDI--Research-based, Developmentally Informed) or "usual practice" conditions. The intervention involved brief lessons, "hands-on" extension activities, and specific teaching strategies linked empirically with the promotion of: (a)…

This dissertation study employed quantitative methods to investigate the impact of adult questioning styles on children's novel vocabulary acquisition during shared storybook reading. In an effort to examine adult qualitative variations in shared storybook readings, two experiments were conducted to assess the effect of noneliciting questions…

Several research studies linking early phonemic awareness to the prevention of later reading difficulties strongly suggest that phoneme segmentation and blending, rather than rhyming and alliteration abilities, are the key aspects of phonemic awareness that are related to the prevention of difficulties. Yet there is a persistent belief among many…

A variety of preschool curricula is available and in widespread use, however, there is a lack of evidence from rigorous evaluations regarding the effects of these curricula on children's school readiness. The lack of such information is important as early childhood center-based programs have been a major, sometimes the sole, component of a number…

The effects of an eight-week instructional program in creative dance/movement on the social competence of low-income preschool children were assessed in this study utilizing a scientifically rigorous design. Forty preschool children from a large Head Start program were randomly assigned to participate in either an experimental dance program or an…