MathILy is an intensive five-week residential summer mathematics program held at Bryn Mawr College near Philadelphia for mathematically talented high school students. Unlike traditional lecture-based programs, MathILy emphasizes student-driven exploration — participants make and prove their own conjectures while instructors provide scaffolding and frameworks. The program covers advanced discrete mathematics and proof-based reasoning in a collaborative, playful environment described as "serious mathematics infused with levity." International students are welcome. For the published 2026 edition, the Carina and Polynera Funds guaranteed the full demonstrated financial need of admitted students, potentially waiving the entire fee. That guarantee has not been confirmed for a future cycle.
The published June 28–August 1, 2026 edition is historical. Its full-consideration application deadline was April 28, 2026; subsequent applications depended on space, and the official application page now says new 2026 applications are no longer considered. The balance payment date was May 19, 2026. The fee and full-need guarantee above refer to the 2026 edition.
Checked November 4, 2026 using the official homepage, facts and financial aid and application process. The application page’s future short-form sentence says October 2027 or later for 2027. That wording does not establish an October 2026 opening, and reliable 2027 application dates, program dates and fees remain unconfirmed.