American Montessori Society (AMS)  
   National center for Montessori information, with emphasis on team-teaching wherein students work under faculty with strengths in various areas of theory and practicum. School consultation and accreditation protocol, affiliated teacher preparation courses,
   http://www.amshq.org/

National Center for Montessori Education  
   Stated goals of promoting unity among Montessorians and providing creditable Montessori teacher education programs.
   http://www.montessori-ncme.org/

Association Montessori Internationale (AMI)  
   Organization founded in 1929 by Dr. Maria Montessori to maintain the integrity of her life's work and to ensure its perpetuation after her death. Guidance for AMI training courses, for establishment of schools, for manufacture of approved educational mate
   http://www.montessori-ami.org/

International Montessori Society (IMS)  
   Promotes commitment to Montessori principles, with emphasis on preparation of the environment and unobtrusive observation in deference to the individual liberty of the student. School consultation and recognition criteria, publications, teacher education,
   http://www.wdn.com/trust/ims/

Montessori Association of New Zealand (MANZ)  
   Resource for parents, educators, and researchers. Teacher training, conferences, news and listing of schools.
   http://www.montessori.org.nz/

Canadian Council of Montessori Administrators (CCMA)  
   Supports Montessori school administrators in Canada, offering expertise in school administration and the Montessori Method of education.
   http://www.ccma.ca/ccma/

Michigan Montessori Society  
   The society promotes the philosophy of Maria Montessori and provides resources to teachers, parents, and administrators.
   http://mmsoc.org

Montessori Teachers Collective  
   Non-affiliated online community whose members advocate peace, community and children as embodied in the educational methods forwarded by Dr. Maria Montessori.
   http://www.moteaco.com/

The Montessori Foundation  
   Non-profit organization dedicated to the advancement of Montessori education in the U.S. and abroad. Programs and resources for parents, teachers, administrators, and board members.
   http://www.montessori.org/