For state and federal officials seeking to improve school performance, 50 years of evidence shows that high-quality, voluntary pre-kindergarten is among the best strategies for education reform. This brief from Pew's Pre-K Now initiative highlighted findings from evaluations of state-funded Pre-K programs that continue to document gains in key measures of student learning, including early literacy, math and vocabulary; reduced need for special and remedial education; and significantly lower incidences of grade retention. This and other ongoing research once again demonstrates that high-quality early education is the natural first step in effective school reform. (Contains 3 endnotes.)