The Calvin University Math Circle is an opportunity for 6th–8th grade students (typically 11–13 years old) to engage with exciting problems and topics in mathematics. Meetings are led by a professor ...

It began as a fifth-grade math competition program in 1989, with teams from 44 schools taking part. In 1995 the competition was expanded to include 6th grade, and in 2022, 4th grade was added.