Children's Defense Fund
https://www.childrensdefense.org/
Clearinghouse on Early Education and Parenting (CEEP)
http://ceep.crc.uiuc.edu/
U.S. Department of Health & Human Services: Administration for Children & Families National Child Care Information Center
https://www.acf.hhs.gov/occ
Zero to Three
https://www.zerotothree.org/