Research Findings: As policymakers expand access to preschool, the sociodemographic composition of preschool classrooms will become increasingly important. These efforts may create programs that increase the concentration of children from low-income families or, alternatively, foster the creation of socioeconomically diverse preschool classrooms.…

This study examined associations between quality of social and physical environments in preschools and children's development of academic, language, and literacy skills, and the extent to which preschool quality moderated the associations between child risk and development. Participants were a diverse sample of 540 four-year-old children in…