Non-parental arrangements for young children serve a dual function as supports for parental activities and educational inputs for children. However, arrangements that are suited to meet families' specific needs and preferences are sometimes in tension with experts' definitions of "quality." Researchers and policymakers increasingly…

This nonexperimental, longitudinal field study examines the extent to which variation in observed classroom supports (quality of emotional and instructional interactions and amount of exposure to literacy and math activities) predicts trajectories of achievement in reading and math from 54 months to fifth grade. Growth mixture modeling detected…