Mathematics

Use straight lines to learn about circles.

String and scissors are all you need to find pi all around you.

Randomly toss some toothpicks, with pi as your reward.

by Pearl Tesler • June 28, 2017

Cardboard gets its Amazonian strength from simple geometry.

What do plants know about numbers? Paul Dancstep investigates.

Pi Day isn't just a day—it's a way of life.

Explore graphing, angles, and storytelling by building a seesaw for your smartphone.

Turn your phone into a pocket science laboratory with tools to measure light, motion, sound, and more.

Find the height of a tree, paper rocket or North Star.

Ready for liftoff? Launch rockets with your own launcher!

Square wheels roll smoothly on a round road.

See how images appear in a curved mirror.

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