The M3 Challenge spotlights applied mathematics as a powerful problem-solving tool, as a viable and exciting profession, and as a vital contributor to advances in an increasingly technical society. Scholarship prizes total $80,000. The Challenge is entirely Internet-based and there are no entrance or participation fees. High schools in New England and Mid-Atlantic states may enter up to two teams of three to five students each. Students choose which day they wish to work on Challenge weekend and have 14 hours to solve an open-ended, realistic, applied math-modeling problem focused on real-world issues. Teams can work from any location they choose and can use any free and publicly available resources, but they may not discuss any aspect of the problem with, or seek help from, their coach or anyone other than their teammates.