In order to foster ICMI efforts about international collaboration and exchanges in mathematics education, the ICMI organizational outreach includes multi-national organizations with interest in mathematics education, each operating in ways consistent with the aims and values of the Commission. The organizations affiliated to ICMI are independent from the Commission, being neither appointed by ICMI nor operating on behalf or under the control of ICMI, and they are self-financed. But they collaborate with ICMI on specific activities, such as the ICMI Studies or components of the program of the ICMEs. The ICMI Affiliate Organizations produce quadrennial reports to be presented to the General Assembly of ICMI, and a brief annual report on their activities for the ICMI annual report. Each of the Affiliate Organizations holds separate meetings on a more or less regular basis.
There are currently five multi-national Mathematical Education Societies and six international Study Groups which have obtained affiliation to ICMI.
With the revision of its Terms of Reference made in 2009, ICMI has introduced the notion of affiliation to ICMI of multi-national societies active in mathematics education. This has resolved the long-felt need of formalizing the links of ICMI with various bodies sharing common aims with the Commission.
The multi-national Mathematics Education Sciety currently affiliated to ICMI, with its year of affiliation, is:
The ICMI organisational outreach includes six permanent Study Groups, each focusing on a specific field of interest and study in mathematics education consistent with the aims of the Commission. The Study Groups currently affiliated to ICMI, with their year of affiliation, are: