History of CIS
1962 - 63 Copenhagen International School started by Mrs. Frank B. Gallagher and a small group of parents seeking to provide their 12 children with an English-language education. The school rented one room at Bagsværd Kostskole and Gymnasium and hired one teacher to supervise the program, which consisted of high school correspondence courses from the University of Nebraska Extension Division.
1971 - 72 The first International Baccalaureate Diploma is earned by CIS student Pavel Pisa (Czechoslovakia)
1972 - 73 Accreditation is granted by the European Council of International Schools - the second school in Europe to receive this honor.
1973 - 74 The Copenhagen International Junior School is started by Charles A. Gellar: located at Stenosgade in rented accommodation, first principal Inez Sullivan, 16 students on the first day, 38 students half a year later.
1981 CIS is accredited by the New England Association of Schools and Colleges.
1983 20th anniversary of CIS and 10th anniversary of CIJS are celebrated
1988 CIS celebrates its 25th Anniversary.
1993 - 94 The merger of CIS and CIJS. Move to Hellerupvej, Hellerup. Inauguration of the new school by HRH Princess Benedikte.
1995 - 96 Introduction of the IB Middle Years Programme.
1997 - 98 Inauguration of the new primary building by HRH Princess Benedikte. The first of 3 phases starts in order to change from a 13 year to a 12 year academic program.
2000 - 01 Introduction of the IB Primary Years Programme.
2001 - 02 Inauguration of the new sports hall by HRH Princess Benedikte.
2007 - 08 A new strategic plan is developed.

The student body in 1970.