Books and Articles

"Hidden Harmonies: The Lives and Times of the Pythagorean Theorem"
by Robert Kaplan and Ellen Kaplan
Buy at Barnes & Noble Online!

Buy at IndieBound!

Bozo Sapiens: Why to Err is Human
by Michael and Ellen Kaplan

"Out of the Labyrinth: Setting Mathematics Free"
by Robert Kaplan and Ellen Kaplan

"Chances Are . . . : Adventures in Probability"
by Ellen Kaplan and Michael Kaplan

"The Art of the Infinite: The Pleasures of Mathematics"
by Robert and Ellen Kaplan

more books...


We are a non-profit organization and welcome contributions. Click here for information about our fundraising campaign...


Disturbed by the poor quality and low level of math education in the country, three of us began The Math Circle in September 1994...



Our courses are located on the campus of Harvard University. [learn more...]

Contact Us

For general questions:
Bob and Ellen Kaplan:
Treasurer: Elizabeth Potter
Web design: Nat Stahl
Mailing Address:
The Math Circle
27 East St.
Southampton, MA 01073
Emily Peters


Want to start your own Math Circle? Founders Robert and Ellen Kaplan can be hired as consultants to help get you going. Feel free to contact Bob and Ellen Kaplan directly to learn more about what they can do for you. They are willing to travel to your locale to help out. Their per-diem fee is $1000 plus expenses.