This newly released report by the U.S. Department of Education shares the experiences of four diverse school districts as they adopt personalized learning approaches that will prepare their students to succeed in the 21st century global economy. The case studies share the thinking, planning, and actions taken by each district, captured by addressing three questions: What are the grantees’ approaches to personalized learning? What actions did they take in the early stages of implementation? What realities did they encounter as they implemented their ideas and plans? The report concludes with a set of considerations for districts interested in assessing their readiness for a transition to personalized learning environments.