Maria Montessori at the Panama-Pacific International Exposition, San Francisco, USA in 1915. The theme of the Exposition was "Innovation" where Maria had been invited to showcase innovation in education. She established a glass-walled "Glass Classroom" demonstrating her educational methods to visitors for several months and gave many public lectures and a training course as well. Photographer Bianca Conti (1881 London, England —1954 Alameda, CA, USA). The photo was made as a publicity photo, and Maria sent one home to her father together with one of her letters from California.
