The Rockefeller Early Childhood Program provides educational experiences and child care for children aged six weeks to three years. It was developed to determine the effects of a high-quality education coupled with an extended-day childcare program on children who were from six months of age through the sixth grade in school. Rockefeller opened to early childhood and intermediate students (grades 4–6) in August 1979 with an enrollment of 563. It became a full elementary school and center for early childhood education in 1987. The school currently serves children ranging in age from 6 weeks through 5th grade.