In her medical practice, her clinical observations led her to analyze how children learn, and she concluded that they build themselves from what they find in their environment . Shifting her focus from the body to the mind, she returned to the university in 1901, this time to study psychology and philosophy. In 1904, she was made a professor of anthropology at the University of Rome. Her desire to help children was so strong, however, that in 1906 she gave up both her university chair and her medical practice to work with a group of sixty young children of working parents in the San Lorenzo district of Rome. What ultimately became the Montessori method of education developed there, based upon Montessori's scientific observations of these children's almost effortless ability to absorb knowledge from their surroundings, as well as their tireless interest in manipulating materials .
Children teach themselves.
Maria Montessori made her first visit to the United States in 1913, the same year that Alexander Graham Bell and his wife Mabel founded the Montessori Educational Association at their Washington, DC, home. Among her other strong American supporters were Thomas Edison and Helen Keller. On this second U.S. visit, she also conducted a teacher training course and addressed the annual conventions of both the National Education Association and the International Kindergarten Union. The committee that brought her to San Francisco included Margaret Wilson, the daughter of U.S. President Woodrow Wilson. The Spanish government invited her to open a research institute in 1917.