Support for publicly funded pre-kindergarten has increased tremendously in recent years as parents, educators and policy makers have come to recognize the many benefits of high-quality early education. As of 2008, 38 states and the District of Columbia invest in pre-k programs, and many school districts are doing so on their own with local and…

Today, policymakers with an interest in school success no longer debate why states should provide pre-kindergarten; that case has been made successfully to voters, educators, and researchers. Instead, policymakers now wrestle with how to get the job done. Increasingly, they turn to what those in the pre-k field call "diverse" or…