Western Association of Schools and CollegesFrom Website: The Accrediting Commission for Schools, Western Association of Schools and Colleges (ACS WASC), a world-renowned accrediting association and one of the six regional accrediting agencies in the United States, works closely with the Office of Overseas Schools under the U.S. Department of State. ACS WASC provides assistance to schools worldwide, primarily in California, Hawaii, Guam, Asia, the Pacific Region, the Middle East, Africa, and Europe.