U.S. Department of Education, Office of Non-Public Education
http://www.ed.gov/about/offices/list/oii/nonpublic/index.html

National Association of Independent Schools (NAIS)
http://www.nais.org/

The Association of Boarding Schools (TABS)
http://www.boardingschools.com/

Canadian Accredited Independent Schools (CAIS; formerly SEAL Canada)
http://www.cais.ca/

AdmissionsQuest
http://www.admissionsquest.com/

Association of Independent School Admission Professionals (AISAP)
http://www.aisap.org/

Independent Educational Consultants Association (IECA)
http://www.educationalconsulting.org/

Elementary School Heads Association (ESHA)
http://www.elementaryschoolheads.org/

National Association for College Admission Counseling (NACAC)
http://www.nacac.com/

Council for American Private Education (CAPE)
http://www.capenet.org/

Ten Schools Admission Organization (TSAO)
http://www.tenschools.org/

Junior Boarding Schools Association (JBSA)
http://www.jbsa.org/

Small Boarding Schools Association (SBSA)
http://www.smallboardingschools.org/

Western Boarding School Association (WBSA)
http://www.wbsa.net/

The National Coalition of Girls' Schools (NCGS)
http://www.ncgs.org/

The International Boys' Schools Coalition (IBSC)
http://www.boysschoolscoalition.org/

Network of Sacred Heart Schools
http://www.sofie.org/

National Business Officers Association (NBOA)
http://www.nboa.net/

European Council of International Schools (ECIS)
http://www.ecis.org/

Council of International Schools (CIS)
http://www.cois.org/

East Asia Regional Council of Overseas Schools (EARCOS)
http://www.earcos.org/