Dhahran Ahliyya School (Arabic: مدارس الظهران الأهلية‎), originally a private Arabic-medium day school, is now a dual language school moving gradually toward a more international curriculum. DAS was founded in 1977 and has achieved American accreditation from AdvancED (NCA CASI), so it can offer both a Saudi diploma and an American diploma. Dhahran Ahliyya Schools is an authorized school for International Baccalaureate (IB) Primary Years Programme and is pursuing authorization for its Middle Years Programme as part of an IB World School.