The Dunkel System, also known as the Dunkel College Football Index, is a college football rating system developed in 1929 by Richard C. "Dick" Dunkel, Sr. (1906–1975), to determine a national champion. Dunkel rated college football teams from 1929 until his death in 1975. His ratings are recognized by the National Collegiate Athletic Association (NCAA) in its Football Bowl Subdivision record book. The NCAA describes Dunkel's methodology as a "power index system." Dunkel described his system an index and claimed that "his difference by scores is scientifically produced."