Welcome to the San Diego Math Teachers’ Circle!


The San Diego Math Teachers’ Circle is an informal monthly program that aims to engage teachers and mathematicians in working together on intriguing and stimulating problems. Through this collaborative process, we seek to provide teachers with an opportunity to enrich their knowledge and appreciation of mathematics. We feel that problem-solving abilities and critical thinking engender success in many fields, and that promoting these abilities in teachers will, in turn, foster them in their students.

The San Diego Math Teachers' Circle is free to all middle school math teachers in San Diego County. We meet once a month on Saturdays from October to April (click here for a detailed schedule). A light continental breakfast is provided at every meeting!

The San Diego Math Teachers’ Circle is not affiliated with any school or school district and is open to teachers from public schools, private schools, or home schools. It is a program similar to the San Diego Math Circle, but geared primarily for middle school teachers. Activities will be led by math professionals from the Art of Problem Solving, our staff, and others.

Click here for more information about us.

Upcoming Events

  • First meeting of 2017-18!
    Our first session of 2017-18 will be on Saturday, October 7 at UCSD. See description below, and visit the Calendar page for more specific information. Please click here to RSVP.

    Candy Sharing
    David Patrick, Art of Problem Solving

    If we give a bunch of children several pieces of candy, and force them to share with their neighbors in a particular way, can we end up with each child having exactly 1 piece of candy, or will we end up in an infinite sharing loop? We'll discuss this and other related sharing scenarios. Candy will be provided if you promise not to eat it until the end of the session. Plus a fun kick-off-the-year contest to get us warmed up, where you might win a (somewhat) fabulous prize!

    Posted Sep 19, 2017, 2:18 PM by Trang Vu
  • Fall 2017 Schedule
    Our Fall 2017 schedule will be:

    October 7 at UCSD
    November 4 at SDSU
    December 2, location TBA

    Please see our Calendar page for more information.
    Posted Aug 3, 2017, 1:00 PM by David Patrick
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About our Logo


Our logo reflects both our coastal location and the mathematical nature of what we do.  Reminiscent of a nautilus shell against an ocean background, the spiral was generated by dividing a disc into 12 equal parts and dropping perpendiculars from one ray to the adjacent one. This process creates seashell-like shape that is not only aesthetically pleasing, but also gives rise to a number of interesting math questions spanning a broad range of depth and difficulty. What type of triangles form the seashell shape? How are they related to one another? What is the length ratio of two adjacent triangles of the same color? Suppose we start at the 2 o’clock position and continue spiraling inward ad infinitum. What is the limit of the sum of the short lengths of all the triangles? For answers to some of these questions and more, click here.