Montessori
"The International Montessori Index was created to provide detailed comparative information in order to help parents and teachers search for a school or training center."
http://www.montessori.edu/
A wealth of Montessori information for parents and teachers including an excellent magazine titled, "Tomorrow's Child."
http://www.montessori.org/
"AMS is a non-profit, non-discriminatory service organization dedicated to encouraging and supporting the use of the Montessori teaching approach in private and public schools."
http://www.amshq.org/
Helpful information for parents and a weekly e-newsletter
www.understandingmontessori.com
AMI was founded by Maria Montessori in 1929 and continues to train teachers, offer conferences and support the work of Montessori education
www.montessori-ami.org