Southeastern Oklahoma State University, often referred to as Southeastern and abbreviated as SE, or SOSU, is a public university located in Durant, Oklahoma, with an undergraduate enrollment of approximately 4,000 as of 2005. On March 6, 1909, the Second Oklahoma State Legislature approved an act designating Durant as the location for a normal school to serve the following 12-county region: Atoka, Bryan, Carter, Choctaw, Latimer, LeFlore, Love, Marshall, McCurtain, McIntosh, Pittsburg, and Pushmataha. Southeastern Oklahoma State University first opened its doors to students on June 14, 1909, as Southeastern State Normal School. The early program of instruction consisted of four years of high school and the freshman and sophomore college years. The first sessions of the school were held in temporary quarters pending completion of Morrison Hall in January, 1911, long known as the Administration Building. The original purpose of Southeastern was the education of teachers for the public schools of Oklahoma. The two-year graduates were awarded life teaching certificates. In 1921, the institution became a four-year college and was renamed Southeastern State Teachers College.