## Build an Earthquake Machine

In this activity from IRIS, students explore a mechanical model of a fault to learn how energy is stored elastically in rocks and released suddenly as an earthquake.

## Kitchen Math: How To Eat π Pies

Methodically slice up four pies to reach the irrational number pi.

## How Dense Is Snow?

Use a measuring cup to figure out the density of snow.

## Snotty Plots: How Do You Graph A Sneeze?

Simulate a sneeze with paint, then graphically determine where most of it lands.

## No Waffling on the Numbers

Three delicious math games you can play on your waffles to build math fact fluency and geometry skills, from the folks at Bedtime Math.

## Zip Line Zoo

In this activity from Bedtime Math, you’ll build a stuffed-animal zip line and practice measuring time, distance, and angles.

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## Alan Alda’s Challenge to Scientists: Define Color

Alda’s ‘Flame Challenge’ asks scientists to explain color—with children as the judges.

## ‘The Simpsons’ Has Been Drip-Feeding Us Math

An excerpt from “The Simpsons and Their Mathematical Secrets.”

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## Annual Prizes Honor the Stranger Side of Science

The IgNobel Prizes salute unusual research, such as an investigation of dung beetle navigation.