The policy decisions of state, district and school educators affect the extent to which students have access to high-quality practices. This is especially relevant for students with disabilities and their families. This article summarizes a presentation made at the 2019 AAIDD conference and proposes an operational role for policy makers. Two frequently cited advances in education are (a) the commitment to adopt "evidence-based practices," and (b) the impact of information technology and data systems on the active "use of data for decision making" in schools. This article reviews the integrative role that policy decisions make in transforming effective practices and good data systems into practical outcomes for children and families.