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Research

One study reviewed by the WWC investigated the effects of Ready, Set, Leap!® in a center-based setting. The study (RMC Research Corporation, 2003) was a randomized controlled trial that met WWC evidence standards. The study included 254 preschool children from 17 inner-city schools in Newark, New Jersey. RMC Research Corporation compared oral language, print knowledge, phonological processing, and early reading/writing outcomes for children in the intervention group that participated in Ready, Set, Leap!® as well as the standard preschool curriculum (High/Scope) to a comparison group that participated only in High/Scope. 4

Extent of evidence

The WWC categorizes the extent of evidence in each domain as small or medium to large (see the What Works Clearinghouse Extent of Evidence Categorization Scheme). The extent of evidence takes into account the number of studies and the total sample size across the studies that met WWC evidence standards with or without reservations. 5

The WWC considers the extent of evidence for Ready, Set, Leap!® to be small for oral language, print knowledge, phonological processing, and early reading/writing. No studies that met WWC evidence standards with or without reservations addressed cognition or math.

4 High/Scope is a curriculum intended to be used as an open framework that adults adapt to the needs of their group. Active learning, rather than direct teaching or sequenced exercises, is its central tenet.
5 The Extent of Evidence Categorization was developed to tell readers how much evidence was used to determine the intervention rating, focusing on the number and sizes of studies. Additional factors that are associated with a related concept, external validity, such as students' demographics and the types of settings in which studies took place, are not taken into account for categorization.