In early 1970 the municipality of Dübendorf, a suburb near Zurich, had just completed the construction of a new primary school, but only required half of the rooms.

In April 1970, the lower primary classes moved out of the lakeside villa in Zurich to the new temporary facility in Dübendorf.

At the same time, the board of trustees had found a farmer in Zumikon who was willing to sell ICS some of his land.

After receiving two major loans from Credit Suisse and the Union Bank of Switzerland, ICS was ready to build its own facility.

The 1974 'Brink Report' by the Board of Trustees formulated plans for the development of a secondary school at ICS.

The IB programmes are designed to facilitate transition to and from national education systems and entry into universities around the world.

Class maximum size varies between 16 and 24 depending upon grade level and there is a student-teacher ratio of approximately 8:1.