The International Mathematical Modeling Challenge (IMMC or sometimes IM2C) is an international mathematical modeling competition for high school students in team mathematical modeling co-sponsored by COMAP and the NeoUnion ESC Organization. Teams are selected on a country-by-country basis, with each country sending its top two teams to the competition. The IMMC was inspired by the HiMCM, a similar contest sponsored by COMAP but mainly attracting teams within the United States. The HiMCM in turn was established in the 1990s to create a high school counterpart to COMAP’s MCM. Contestants in the IMMC are given five days to research (the contest permits the use of any inanimate source) and write a mathematical paper detailing their mathematical model for a given situation. At the conclusion of the five-day period, papers are sent to an international expert committee composed of mathematics faculty from the world’s leading universities. Traditionally, 3-4 teams are awarded the top designation of Outstanding and invited to an awards ceremony, held in a different country each year.