Preschool: First Findings from the Third Follow-up of the Early Childhood Longitudinal Study Birth C
http://nces.ed.gov/pubsearch/pubsinfo.asp?pubid=2008025
Studies a nationally Representative sample of children born in 2001. Focus is on language, literacy, mathematics, fine motor skills, nonparental education and care experiences when the children were about 4 years old. From the National Center for Education Statistics
