The Urban Institute will partner with the District of Columbia’s Office of the State Superintendent of Education (OSSE) Division of Early Learning (DEL) on Project ASQC. The partnership study will address the pressing need for research on the supply of quality child care and investments in quality improvement initiatives. Across the country, state child care administrators are challenged with meeting the needs of low-income families seeking quality care, especially during nontraditional hours, in high-poverty communities, and for infants and toddlers whose care is more costly to provide. This mixed-methods research project will improve the field’s understanding of these issues. Using multiple data sources, we will examine the supply of quality child care after the 2018 implementation of Capital Quality, a redesigned Quality Rating and Improvement System (QRIS), and the perspectives of child care providers, teaching staff, and families on this new system.