An intensive three-week online summer mathematics programme for middle and high school students aged 12 to 18 from around the world, designed to sharpen problem-solving skills well beyond the standard school curriculum. Classes run Monday to Friday, pairing a 90-minute lecture with a 60-minute problem-solving session, and three consecutive sessions are offered across June, July and August so students can take one or more. Admission requires a student account, an application, a recommendation from a mathematics teacher or mentor, and an admissions test; applying earlier secures both lower tuition and better course selection.