The International Mathematical Modeling Challenge (IM²C) is a team-based mathematical competition for Australian secondary students.

Operating in teams, comprising up to four students from the same school, participants must work collaboratively to solve a problem (set globally) by devising and applying an original mathematical model.

Constrained to a period of five consecutive days, teams unpack the given problem, hypothesise, test, and develop a working solution, before preparing and submitting a report on their solution to the Australian judging panel. The best two solutions then progress to compete against the other participating countries on an international level.

The IM²C exists to support the real-world application of learning, build proficiency, encourage collaboration, and challenge students to use mathematics to make a real difference to the world around them.