nine television stations broadcasting in South Dakota; South Dakota Public Television broadcasts from a number of locations around the state, while the other stations broadcast from Sioux Falls or Rapid City. The two largest television media markets in South Dakota are Sioux Falls-Mitchell, with a viewership of 246,020, and Rapid City, with a viewership of 91,070. The two markets rank as 114th and 177th largest in the United States, respectively. The state's first television station, KELO-TV, began airing in Sioux Falls in 1953. Among KELO's early programs was Captain 11, an afternoon children's program. Captain 11 ran from 1955 until 1996, making it the nation's longest continuously running children's television program. A number of South Dakotans are famous for their work in television and publishing. Former NBC Nightly News anchor and author Tom Brokaw is from Webster and Yankton, USA Today founder Al Neuharth was from Eureka and Alpena, gameshow host Bob Barker spent much of his childhood in Mission, and entertainment news hosts Pat O'Brien and Mary Hart are from Sioux Falls. Education As of 2006, South Dakota has a total primary and secondary school enrollment of 136,872, with 120,278 of these students being educated in the public school system. There are 703 public schools in 168 school districts, giving South Dakota the highest number of schools per capita in the United States. The current high school graduation rate is 89.9%, and the average ACT score is 21.8, slightly above the national average of 21.1. 89.8% of the adult population has earned at least a high school diploma, and 25.8% has earned a bachelor's degree or higher. South Dakota's 2008 average public school teacher salary of $36,674 was the lowest in the nation (national average was $52,308). In 2007 South Dakota passed legislation modeled after Montana's Indian Education for All Act (1999), mandating education about Native American tribal history, culture, and heritage in all the schools, from pre-school through college, in an effort to increase knowledge and appreciation about Indian culture among all residents of the state, as well as to reinforce Indian students' understanding of their own cultures' contributions. The South Dakota Board of Regents, whose members are appointed by the governor, controls the six public universities in the state. South Dakota State University (SDSU), in Brookings, is the state's largest university, with an enrollment of 12,831. The University of South Dakota (USD), in Vermillion, is the state's