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Nancy McCormick Rambusch travels to the Tenth International Montessori Congress in Paris. She meet Mario Montessori (Maria's son) who was then the head of the Association Montessori Internationale. Rambush is persuaded by Mario to pursue Montessori education coursework in an attempt to bring the method to the United States
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Nancy McCormick Rambusch completes her formal Montessori training in London. She soon begins to conduct Montessori classes for her children and others in her New York City apartment.
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Rambusch establishes and serves as the headmistress of the Whitby School in Greenwich, Connecticut. The creation of the Whitby School encourages others to open Montessori schools in the United States.
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Rambusch is serve as the United States representative of the AMI by Mario Montessori.
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Rambusch establishes the American Montessori Society.
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Rambusch travels around the county training teachers and helping to open more than 400 Montessori schools in the United States.
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Rambusch authors the book "Learning How to Learn: An American Approach to Montessori"
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Frustrated by the lack of support from the AMI as she attempted to adapt the Montessori philosophy to meet the needs of the American society, Rambusch decides to step down as president of the AMS.
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AMI no longer recognizes AMS as a Montessori affiliate. AMS becomes an independent organization.
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TIME Magazine includes an article about Rambusch and the renewal of interest in the Montessori method in the United States.
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The American Montessori Society continues to grow by partnering with other organizations associated with the education of children, including the Comite Hispano Montessori, the National Association for the Education of Young Children and the Child Development Associate Consortium.
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AMS holds its first International Symposium in Athens, Greece.
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The American Montessori Society has grown to 16,000 members worldwide from 70 different countries. There are 215 AMS accredited Montessori Schools around the world.