This brief summarizes research that was conducted to assess the validity of the Qualistar Early Learning Quality Rating and Improvement System (QRIS) as a tool for improving child care quality in Colorado. The QRIS includes five components that are generally agreed to contribute to high quality care: (1) classroom environment, (2) child-staff ratios, (3) staff and director training and education, (4) parent involvement, and (5) accreditation. Data suggest that much work needs to be done before such systems can be confidently designed and implemented at scale.