The extent and content of education was an important and much contested achievement of the Mexican Revolution. The Ministry of Education helped to expand the number of schools—especially in urban areas but perhaps more significantly in rural Mexico. A corps of teachers were trained for this work, and with official texts in hand, they served as central figures in the interpretation of knowledge and message. The ministry also worked to make significant changes to the content of education in Mexico, playing an integral role in disseminating new conceptions of Mexican history and government messages about the role of government and nation in the lives of Mexicans.