The Calvin College 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 in the Calvin math department and typically begin with a warmup activity or game that leads into the day's problem or topic. The Math Circle seeks to generate enthusiasm for problem-solving in mathematics. Students also discover applications of mathematics and participate in a community that nurtures critical thinking, communication, and abstraction.

#### Time & Location

We meet at Calvin College in North Hall 276 on Monday afternoons. For Spring 2019 we will meet from February 4 through March 25 (eight sessions). Parking is available in Lot 5 (west of the engineering building) and Lot 6 (west of the aquatic center).

- 3:45–4:00 p.m.: setup and arrival
- 4:00–5:15 p.m.: main activity
- 5:15pm: dismissal

#### Cost & Application

*(update Nov. 5, 2018) We are pleased to announce dates for Math Circle in Spring 2019! We will meet Monday afternoons from 4-5:15pm starting February 4 and ending March 25. We hope students from previous semesters will participate again, but we expect there will be new students, too. So we will have all new topics that don't necessarily build on topics from previous semesters.*- Tuition is $80 per semester
- Registration is via Eventbrite (space limited to 20 students)
- At the first meeting please bring a signed copy of the consent form

#### Calendar (Fall 2018)

DAY | TIME | ROOM | TOPIC | PRESENTER |

Monday, September 24 | 4:00–5:15 p.m. | NORTH HALL 276 | Mirror, Mirror | Prof. Mike Bolt |

Monday, October 1 | 4:00–5:15 p.m. | NORTH HALL 276 | Pennies & Paperclips | Prof. Mike Bolt |

Monday, October 8 | 4:00–5:15 p.m. | NORTH HALL 276 | One-cut Figures | Prof. Jan Koop |

Monday, October 15 | 4:00–5:15 p.m. | NORTH HALL 276 | Four Numbers Game | Prof. Mike Bolt |

Monday, October 22 | 4:00–5:15 p.m. | NORTH HALL 276 | Taxman | Prof. Jan Koop |

Monday, October 29 | 4:00–5:15 p.m. | NORTH HALL 276 | Palindromes | Prof. Mike Bolt |

Monday, November 5 | 4:00–5:15 p.m. | NORTH HALL 276 | Latin Squares | Prof. Jan Koop |

Monday, November 12 | 4:00–5:15 p.m. | NORTH HALL 276 | Dragon Fractal | Prof. Mike Bolt |

#### Calendar (Spring 2018)

DAY | TIME | ROOM | TOPIC | PRESENTER |

Monday, February 19 | 4:00–5:20 p.m. | NORTH HALL 276 | Folding Shapes | Prof. Jan Koop |

Monday, February 26 | 4:00–5:20 p.m. | NORTH HALL 276 | Ruler Game | Prof. Mike Bolt |

Monday, March 5 | 4:00–5:20 p.m. | NORTH HALL 276 | Multiplier Graphs | Prof. Mike Bolt |

Monday, March 12 | 4:00–5:20 p.m. | NORTH HALL 276 | New Recruits | Prof. Jan Koop |

Monday, April 9 | 4:00–5:20 p.m. | NORTH HALL 276 | Josephus Problem | Prof. Mike Bolt |

Monday, April 16 | 4:00–5:20 p.m. | NORTH HALL 276 | Modular Arithmetic | Prof. Jan Koop |

Monday, April 23 | 4:00–5:20 p.m. | NORTH HALL 276 | Number Bracelets | Prof. Jan Koop |

Monday, April 30 | 4:00–5:20 p.m. | NORTH HALL 276 | UPC Codes | Prof. Mike Bolt |

#### Calendar (Fall 2017)

DAY | TIME | ROOM | TOPIC | PRESENTER |

Monday, September 25 | 4:00–5:20 p.m. | NORTH HALL 282 | Consecutive Sums | Prof. Jan Koop |

Monday, October 2 | 4:00–5:20 p.m. | NORTH HALL 282 | Pile Division | Prof. Mike Bolt |

Monday, October 9 | 4:00–5:20 p.m. | NORTH HALL 282 | NIM, a mathematical game | Prof. Tom Jager |

Monday, October 16 | 4:00–5:20 p.m. | NORTH HALL 282 | Optimal Dice | Prof. Randy Pruim |

Monday, October 23 | 4:00–5:20 p.m. | NORTH HALL 282 | Criss-Cross | Prof. Gerard Venema |

Monday, October 30 | 4:00–5:20 p.m. | NORTH HALL 282 | Last One Standing | Prof. Mike Bolt |

Monday, November 6 | 4:00–5:20 p.m. | NORTH HALL 282 | Binary Numbers | Prof. Mike Bolt |

Monday, November 13 | 4:00–5:20 p.m. | NORTH HALL 282 | Amida-kuji | Prof. Jan Koop |

#### Additional Info

The Math Circle is an enrichment activity that explores topics generally outside the regular mathematics curriculum. It is for 6th-8th grade students (typically 11-13 years old) who are interested in problem-solving and applications.

Program directors are Professors Mike Bolt (mdb7@calvin.edu) and Jan Koop (kooj@calvin.edu).

The Calvin College Math Circle is supported by the Department of Mathematics and Statistics, the Office of the Provost, and the Office of Pre-College Programs.

Math Circles originated in Russia in the 1930s, appeared in the United States in the 1990s, and are promoted by the National Association of Math Circles. Nearby circles include the Michigan Math Circle (Ann Arbor, MI) and the Maize & Blue Math Circle (Dearborn, MI).