45 CFR 1302.30: Purpose.

All programs must provide high-quality early education and child development services, including for children with disabilities, that promote children's cognitive, social, and emotional growth for later success in school. A center-based or family child care program must embed responsive and effective teacher-child interactions. A home-based program must promote secure parent-child relationships and help parents provide high-quality early learning experiences. All programs must implement a research-based curriculum, and screening and assessment procedures that support individualization and growth in the areas of development described in the Head Start Early Learning Outcomes Framework: Ages Birth to Five and support family engagement in children's learning and development. A program must deliver developmentally, culturally, and linguistically appropriate learning experiences in language, literacy, mathematics, social and emotional functioning, approaches to learning, science, physical skills, and creative arts. To deliver such high-quality early education and child development services, a center-based or family child care program must implement, at a minimum, the elements contained in §§ 1302.31 through 1302.34, and a home-based program must implement, at a minimum, the elements in §§ 1302.33 and 1302.35.