The **International Mathematical Modeling Challenge (IMMC)** is a worldwide competition where teams of high school students work over several days to tackle an open-ended, real-world problem using mathematical modeling. Students must formulate assumptions, build and analyze models, interpret results, and write a clear, well-argued report—much like professional applied mathematicians. IMMC is typically organized through **national or regional coordinators** in participating countries, who run national-level contests and select top teams for the international round. It is aimed at secondary school students (roughly grades 9–12), working in small teams with a teacher or coach. Participants gain experience in collaborative problem-solving, technical writing, and applying mathematics beyond textbook exercises, often strengthening their preparation for STEM university studies and careers. The challenge is conducted **remotely**: teams download the problem, work during an allowed window (usually several consecutive days), and submit their report electronically. Outstanding papers receive international recognition and may be published or showcased by the organizers.