The school has been fully accredited by the Southern Association of Colleges and Schools (SACS) since 1990. Prior to that ISA was accredited by the New England Association of Schools and Colleges but eventually chose to transfer to the SACS accreditation which is more widely represented in this geographical region. The school received a full accreditation visit on the 7 year cycle in 2008 and a successful interim visit was conducted in April of 2004.
The school is also inspected regularly through the Education Ministry of the Netherlands and received a visit in October 2008. In November, 2006, educational advisors from the NOB (nederlands onderwijs in het buitenland) of the Netherlands made a consultation visit to ISA.
Additionally, the school holds a membership in the Association for the Advancement of International Education, is governed by International Schools Services, and is assisted by the Office of Overseas Schools of the U.S. Department of State.