An art school is an educational institution with a primary focus on the visual arts, including fine art – especially illustration, painting, photography, sculpture, and graphic design. Art schools can offer elementary, secondary, post-secondary, or undergraduate programs, and can also offer a broad-based range of programs (such as the liberal arts and sciences). There have been six major periods of art school curricula, and each one has had its own hand in developing modern institutions worldwide throughout all levels of education. Art schools also teach a variety of non-academic skills to many students.