Open-air painting schools developed in Mexico as artistic teaching projects for broad sections of the population during the period of the Revolution (1910–17). The first phase of their existence took place under Victoriano Huerta’s government (1913–14), and their structure was established under the government of Alvaro Obregón (1920–24). Alfredo Ramos Martínez was the project’s main promoter, supported by civil servants, intellectuals and artists. The precepts by which art was to be taught were based on those of John Dewey’s Action School in the USA; children and adolescents, farmers and factory workers were to meet and develop their own ideas with sincerity and simplicity, taking as their model the Barbizon school of landscape painting, with its devotion to contact with untamed nature. The first of the escuelas, situated at Santa Anita Iztapalapa on the outskirts of Mexico City, was named Barbizon. Impressionism, a great deal of naive art and a certain involuntary expressionism were all blended together in the works of the students, who needed no formal qualifications to enter the schools. David Alfaro Siqueiros was among them. The project was extended to Chimalistac and moved on in 1921 to Coyoacán, where an attempt was made to involve native Mexicans and mestizos in order to encourage the production of a uniquely Mexican art. Under the government of Plutarco Elías Calles (1924–8), the open-air painting schools system was expanded to include branches in Xochimilco, Tlalpan and Guadalupe Hidalgo. This expansion, which reached the states of Michoacán and Puebla in the 1930s, was due to the enormous need for expression that arises in periods of transition and social upheaval, when a society’s cultural traditions are under attack. In 1932 the schools’ name was changed to Escuelas Libres de Pintura; entry requirements were also changed. In 1935 government subsidies, already reduced, finally ceased, and the schools went into decline. The Taxco school, under the Japanese director Tamiji Kitagawa (1894–1990), was the last to disappear in 1937, having survived for two years on local resources. Several thousand students attended the open-air painting schools, and their works were exhibited in Berlin, Paris and Madrid in 1926 with great success. During their rise to fame, the schools were enthusiastically supported by Diego Rivera, Alfonso Reyes (1889–1959), Pierre Janet (1859–1947), Eugenio d’Ors and Dewey; during their decline, they were criticized by Siqueiros and Rufino Tamayo.