National Association for the Education of Young Children (NAEYC)- a national association dedicated to improving the well-being of all young children, with particular focus on the quality of educational and developmental services for all children from birth through age 8.

National Association for Family Child Care- a non-profit organization dedicated to promoting quality child care by strengthening the profession of family child care.

Zero to Three- a national nonprofit organization that informs, trains and supports professionals, policymakers and parents in their efforts to improve the lives of infants and toddlers.

PreK Now- a project of the Pew Center on the States and supported by the Pew Charitable Trusts and other funders, PreK Now is a public education and advocacy campaign that advances high-quality, voluntary pre-kindergarten for all three and four year olds.

WoW Kits Blog- full of helpful links on specific topics in early childhood education and care.

American Play Association- Resource links on play

American Academy of Pediatrics- pdf file of the academy's 2007 report describing the importance of play in healthy child development and family relationships