This report from the Learning Policy Institute provides an overview of research on teacher residencies; it also describes state and federal policy trends and opportunities supporting teacher residencies. The authors build on existing research on early model teacher residencies, which provided the basis for federal legislation on residencies. Design elements of these residencies include strong partnerships between educator preparation programs and local education agencies, a full academic year of residency working alongside an expert mentor teacher, financial support for residents’ tuition and living expenses in exchange for teaching in the partner local LEA, and induction and mentoring support. The report includes a look across recent efforts in 12 states to fund and grow high-quality, research-aligned residencies: Arizona, California, Delaware, Indiana, Mississippi, Montana, New Mexico, New York, Pennsylvania, Texas, Washington, and West Virginia.