Arizona State University is a national space-grant institution and public metropolitan research university located on several campuses spread across the Phoenix, Arizona, Metropolitan Area. It is the largest public university in the United States by enrollment. Founded in 1885 as the Territorial Normal School at Tempe, the school underwent a series of changes in name and curriculum, and in 1945 it came under control of the Arizona Board of Regents and was renamed Arizona State College. A 1958 statewide ballot measure gave the university its present name. In 1994 ASU was classified as a Research I institute; thus, making Arizona State one of the newest major research universities in the nation. Arizona State's mission is to create a model of the “New American University” whose efficacy is measured “by those it includes and how they succeed, not by those it excludes”. Currently, Arizona State University is ranked among the Top 25 research institutes in the U.S. in terms of research output, innovation, development, research expenditures, number of awarded patents, and awarded research grant proposals.