Dallas International School Mission Laïque Française (DIS) is an elementary, middle, and high school in the North Dallas area in Dallas, Texas, United States, and is the only international private school in Dallas. It is an English-French school and uses the French educational system. It is a part of the Mission Laïque Française network. Dallas International School is accredited by the Independent Schools Association of the Southwest (ISAS). In 2016, DIS was ranked by the Washington Post as #24 in the nation for "America's Most Challenging High Schools.