On Monday, April 17 at 9 am, Brookings will host a discussion of the state of knowledge on pre-K education. A group of leading researchers will present a consensus statement summarzing what is known about pre-K costs and benefits, curriculum, financing, and more.

As the event page notes

While numerous studies have documented the success of pre-K programs in preparing students for elementary school, some researchers—most notably the authors of a much-discussed analysis of universal pre-K programs in Tennessee—are raising questions about the sustainability of pre-K benefits as children move through their early schooling. 

— Education Next