Art education has evolved over the centuries to emphasize different goals and teaching methods. In the 1800s, public schools focused on drawing skills for the Industrial Revolution. By the early 1900s, the study of great artworks was used to teach moral values. In the 1920s, art became viewed as a way to understand child development and promote personal expression, influenced by John Dewey. Approaches have varied, from advocating innate creativity in the 1970s to the comprehensive Discipline Based Art Education model of the 1980s that is still used today through national standards.