March 14 (3/14), is only a few days away, which means it’s time to celebrate pi, everybody’s favorite irrational mathematical number (the 14 is also Albert Einstein’s birthday). Pi is the ratio of a circle’s circumference to its diameter, and it’s an irrational number, so it can’t be expressed as a simple fraction of two integers. 3.14 is just the beginning of pi, which goes on for infinity.

This STEM-themed holiday is an ideal time to plan some Pi-filled activities for your classroom or for children at home. Here are our five great tips to celebrate math on Pi Day.

- Prove Pi exists by measuring the circumference and diameter of circular objects around the classroom or house and solving for the equation: circumference = (pi) x (diameter).
- See how many digits of the number Pi you can recite. A Japanese man in 2005 memorized pi to 83,431 digits.
- Write a Pi-ku, a math version of the traditional 5-7-5 syllabic haiku. A Pi-ku of course, follows a 3-1-4 syllabic pattern.
- Bake a Pi-themed pie. Whether savory or sweet, eating deliciously circular pies is a highlight of every Pi day.
- Impress your friends by learning the song, “Mathematical Pi,” set to the tune of “American Pie”; or sing Pi Day carols.

For example:

Math is fun

When

Mixed with some pie

*Margaret Yau is a student at the University of California, San Diego, and an intern in ED’s Office of Communications and Outreach*