There are three main series of conferences organized on a regular basis by ICMI or under its auspices.
A major event in the life of the international mathematical education community, the quadrennial ICME is held under the auspices of ICMI and typically gathers more than three thousand participants from all over the world.
Each ICMI Study addresses an issue or topic of particular significance in contemporary mathematical education, and is conducted by an international team of leading scholars and practitioners in that domain appointed by the Executive Committee of ICMI. Each ICMI Study has an international conference associated with it. Beyond the productive interaction and collaborations occasioned by this event, the main product is a Study volume, which aims to offer a coherent, state-of-the-art representation of the domain of the Study. It is these Study volumes that constitute the New ICMI Study Series (NISS).
The Commission offers moral and sometimes financial support to facilitate the organization of regional meetings on mathematical education, especially in less affluent parts of the world. Many of these ICMI Regional Conferences are taking place at regular intervals.
In addition to above activities of a regular nature, ICMI takes other initiatives on an ad hoc basis.