The Montessori method revolutionized how children were educated. In ''Dr. Montessori''s Own Handbook'', Maria Montessori explains the basics of her system, how it works and why it works. There are dozens of figures to help illustrate her points. "My method is scientific, both in its substance and in its aim. It makes for the attainment of a more advanced stage of progress, in directions no longer only material and physiological."