This publication summarizes an academic review paper on preschool effectiveness, "Lottery Evidence on the Impact of Preschool in the United States: A Review and Meta-Analysis" by Jesse Bruhn and Emily Emick. The 44 papers summarized fall into three categories: studies of three model preschool programs begun in the 1960s known as…

This paper reviews research on the design and effectiveness of preschools in the United States. Three randomized controlled trials that enrolled roughly 350 total children in demonstration studies during the 1960s and 1970s shape much of the current discussion of preschool. We examine what these studies and more recent ones based on random…