Key Citations:
1. Karoly LA. Early Childhood Interventions: Proven Results, Future Promise. RAND Corporation, 2005.
2. McKey, Ruth Hubbell. "The Impact of Head Start on Children, Families and Communities. Final Report of the Head Start Evaluation, Synthesis and Utilization Project." (1985).
3. Schweinhart L, Montie J, 2004. The High/Scope Perry Preschool Study to Age 40. High/Scope Educational Research Foundation. High/Scope Educational Research Foundation. Accessed on December 21, 2012: click here