Evidence-based reform in education refers to policies that enable or encourage the use of programs and practices proven to be effective in rigorous research. This article discusses the increasing role of evidence in educational policy, rapid growth in availability of proven approaches, and development of reviews of research to summarize the evidence. A highlight of evidence-based reform was the 2015 passage of the Every Student Succeeds Act, which defines strong, moderate, and promising levels of evidence for educational programs and ties certain federal funding to use of proven approaches. To illustrate how coordinated use of proven approaches could substantially improve educational outcomes, the article proposes use of proven programs to populate each of Tiers 1, 2, and 3 in response to intervention policies.