The National Association of British Schools in Spain (NABSS) exists to defend members' interests, to help maintain the quality of British education in Spain, and to support school development. All member schools are fully authorised- at least for a large section of the school-and are subject to inspection.

NABSS offers regular training to schools and there is an annual conference. The Association has its own inspection system, which is recognised by the British Council, and which also forms part of the British Schools Overseas inspections within Spain.