References

Meet WWC evidence standards

RMC Research Corporation. (2003). Ready, Set, Leap! program: Newark prekindergarten study 2002-2003 final report. Retrieved from LeapFrog SchoolHouse website: http://www.leapfrogschoolhouse.com/content/research/
RMC_RSLreport.pdf.

Preschool Curriculum Evaluation Research (PCER) Consortium. (2008). Effects of preschool curriculum programs on school readiness (NCER 2008-2009). Washington, DC: National Center for Education Research, Institute of Education Sciences, US Department of Education. Washington, DC: US Government Printing Office.

Studies that fall outside the Early Childhood Education protocol or do not meet WWC evidence standards

Abt Associates Inc. (2007). Evaluation of child care subsidy strategies: findings from Project Upgrade in Miami-Dade County. Retrieved from US Department of Health and Human Services, Administration for Children and Families website: http://www.acf.hhs.gov/programs/opre/cc/upgrade_miami_dade/reports/
upgrade_miami_dade/upgrade_miami_dade.pdf. The study did not meet WWC evidence standards because the intervention and comparison groups are not shown to be equivalent and the overall attrition rate exceeds WWC standards for this area.

For more information about specific studies and WWC calculations, please see the WWC Ready, Set, Leap!^® Technical Appendices.