Legislative Action Center
You can let your representatives in Congress know where you stand on various public policy issues, by using CAPE's Legislative Action Center.
URL: http://capwiz.com/cape/home/

State Regulation of Private Schools
This publications by the Office of Non-Public Education at the U.S. Department of Education "provides a brief description, by state, of the legal requirements that apply to private schools."
URL: http://www.ed.gov/pubs/RegPrivSchl/index.html

Private Schools: A Brief Portrait
This report from the National Center for Education Statistics "examines private schools, how they differ by type (Catholic, other religious, and nonsectarian), and how they differ from public schools."
URL: http://nces.ed.gov/pubs2002/2002013.pdf

Council for American Private Education
The Council for American Private Education (CAPE) is a coalition of national organizations and state affiliates serving private elementary and secondary schools.
URL: http://www.capenet.org/index.html