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…

Preparing teachers to implement a new curriculum presents a significant but important challenge. While formal professional development programs can assist in this preparation, finding prescribed experiences that meet the needs of all teachers can be formidable and indeed may not always be the best option for promoting change in practice. Decisions…