The Council of International Schools (CIS) is a membership organization aimed at international education.
CIS was formed in 1949. It has over 1,360 institutional members consisting of over 740 schools and 610 colleges/universities, located in 122 countries. Many international schools in countries around the world are members. The services of CIS include international educational accreditation.
The CIS headquarters are in Leiden, The Netherlands. CIS's legal name is Council of International Schools, Inc. and it is a "not-for-profit" company registered in the state of Delaware in the United States.
To be CIS Accredited, a school pays the membership fee and then a "registration fee" of €2,140. Once CIS Accredited, the school then pays €4,350 annually. Evaluation of the school takes place every five years.