My friend from Spain recently invited me on a tour down mathematical memory lane. When she and her brother were in school, some time in the 1980’s, they made these geometric solids with their dad. Amazingly, their dad (who is now a granddad) kept the paper solids for all these years and recently gave them…

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## Julia Robinson Mathematics Festival Celebrates Math with Geometiles!

We are proud that Geometiles is part of Julia Robinson Mathematics Festival, a unique math event for kids at any level – from those struggling with math to those who enjoy tackling challenging problems. Julia Robinson Mathematics Festival is a math festival movement of “locally organized events that inspire K through 12 students to think…

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## Lefty or righty? A few words about chirality

Do you see anything unusual about this picture? These two boys are identical twins; but not just any twins: they are mirror twins! That means that many of their features are mirror images of each other. What you can’t see in the picture is that one of the boys is a left-handed and the other…

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## Calculus in a Chair

What can a chair teach us about integral calculus? Quite a bit, if you have right chair. British designer Julian Mayor made just such a chair: Mr. Mayor reckons the chair is much more comfortable than it looks; Igor (pictured sitting) certainly seems happy. Regardless of Igor’s comfort, the chair is a great illustration of what we mean…

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