Listed below are links that will answer most of your questions about the Montessori Method of Education.
The Catechesis of the Good Shepherd
American Montessori International is one of two Montessori Associations which schools, administrators, teachers and parents can become members to keep up-to-date with what's happening in the Montessori world. AMI also has training programs for those desiring to become Montessori teachers.
American Montessori Society is the other Association which schools, administrators, teachers, and parents can become member to keep up-to-date with what's happening in the Montessori world. AMS also has training programs for those desiring to become Montessori teachers.