"The Commission on Secondary Schools is one of three Commissions that function within Middle States Association of Colleges and Schools. The others are the Commission on Higher Education and the Commission on Elementary Schools. The Commission on Secondary Schools serves both public and non-public schools in Delaware, Maryland, New Jersey, New York, Pennsylvania, and the District of Columbia. In addition, it accredits schools in the Caribbean as well as various locations around the world.
The Commission on Secondary Schools (CSS) was established in November 1920 to promote the improvement of secondary education and to secure better coordination and understanding between secondary schools and institutions of higher education. It serves public and non-public middle, intermediate, and/or secondary schools, non-degree granting vocational technical and postsecondary institutions, special purpose schools, supplementary education centers, and distance education institutions. These institutions may be ungraded or have designated grade levels, including a post-graduate level."
From: "Who Are We?" Commision on Secondary Schools: Middle States Association of Colleges and Schools. 18 May 2006. CSS-MSA. 12 January 2009. http://www.css-msa.org/about/accredit.html.