Organizations
American Montessori Society
http://www.amshq.org

International Montessori Index
http://www.montessori.edu/FAQ.html

Videos
Montessori Education for the Early Childhood Years

Teacher training
http://institute.setonmontessori.org/
http://www.mmttc.com/
http://www.stkate.edu/academic/montessori/

Parent Resources
Michael Olaf Montessori materials and information: http://michaelolaf.net/
AMS: http://www.amshq.org/Family Resources.aspx
AMS: http://www.amshq.org/Publications and Research.aspx
Love and Logic: http://www.loveandlogic.com/
Dr. Sears Attachment Parenting: http://www.askdrsears.com/html/10/t130300.asp

Materials
www.nienhuis.com
www.AppleSeedEducational.com
www.montessori-n-such.com
www.littleredrobin.com