sentences:  In 2010 the school announced it would withdraw from the FHSAA.Arlington Country Day School was a member of the Southern Association of Colleges and Schools (SACS), Accreditation International (AI) and the National Council for Private School Accreditation (NCPSA).ACDS also joined the Sunshine Independent Athletic Association (SIAA) in 2010 to allow for more flexibility than the FHSAA could offer.