Findings from the latest study of New Jersey's Abbott Preschool Program showed that children in the state's most disadvantaged communities who participated in the preschool program made significant gains in literacy, language, math and science through 4th and 5th grade. The study found larger gains for children who participated in two years of the preschool program. Additionally, participation was linked to lower retention rates and fewer children needing special education. These findings build on previous results from kindergarten entry and second grade follow-up.
Barnett, W.S., Jung, K., Youn, M. J. & Frede, E.C. (2013) Abbott Preschool Program Longitudinal Effects Study: Fifth Grade Follow-Up. National Institute for Early Education Research, Rutgers — The State University of New Jersey.