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Not Like The Others: 19th Century Presidents

Four 19th century presidents. One doesn’t belong. But which one? That depends on your argument.

Squiggles Collection 1

Everyone starts with the same squiggle. No two drawings end up the same. What do you see?

Math Curiosity: Ulam Spiral

What if we make a huge spiral of numbers and then highlight only the primes? Well, a bunch of weird patterns show up!

Holiday vs Holiday (from a Mascot’s Perspective)

Want something to do during the holiday season that is both fun and involves thinking? Get students writing about what a snowman would think about Halloween or what a ghost would think about Thanksgiving.

Math Curiosity: The Coloring Problem

No video gets me more email from students! How few colors can you use to color in any map so that no two, neighboring regions are the same color?