UPDATE: Watch the new video about the report.
In Puzzling it Out: The Current State of Scientific Knowledge on Pre-Kindergarten Effects, a task force comprised of social scientists lists six consensus statements on what we know about the effects of pre-K and highlights the importance of gathering further evidence to answer three important questions: What features of pre-K programs, specifically, put children on a positive developmental trajectory? What is the best way to scale up small pre-K programs to a school-district or state-wide level? How can we use evaluations of an earlier generation of programs to guide the development of today's pre-K programs? The consensus statement is part of a broader report titled The Current State of Scientific Knowledge on Pre-Kindergarten Effects.