Saint Louis University (SLU, / s l uː /) is a private Roman Catholic four-year research university with campuses in St. Louis, Missouri, United States and Madrid, Spain. Founded in 1818 by the Most Reverend Louis Guillaume Valentin Dubourg, It is the oldest university west of the Mississippi River and the second-oldest Jesuit university in the. Teach For America – St. Louis. 628 likes. Welcome to the Teach For America…