Experts have heralded domain-specific play-based curricula coupled with regular coaching and training as our "strongest hope" for improving instructional quality in large-scale public preschool programs. Yet, details from different evaluations of the strongest hope model are not systematically compiled, making it difficult to identify…

As states and districts expand access to publicly funded PreK programs, researchers and policymakers have been grappling with experimental evidence demonstrating that the benefits of PreK on academic skills are not likely to last into early elementary school. A leading hypothesis to explain this phenomenon is that PreK and the elementary grades…