## Lesson Plan

# Celebrate Pi Day!

Resources from around the web to help you teach (and celebrate!) the most famous of the irrational numbers.

- Grades: 3–5, 6–8

It's almost March 14 (3/14) — and we all know what that means. That's right — Pi Day is coming to a classroom near you!

Start your quest for pi by reading "A Brief History of Pi," which chronicles the history of this remarkable (though irrational) number that stretches back 2,000 years B.C.E. Learn how the ancient Egyptians and Babylonians first divined pi and find out how the search for the exact value for pi continued until early modern times. More advanced students might want to check out Pi Through the Ages, which provides a more detailed history of pi theories.

Trying to find answers to a few basic questions about pi? Don't miss Dr. Math's Pi Page. This site contains many fascinating facts about pi — including a basic definition for those who are still stumped by the mathematical mystery.

And if you're ready for a few tunes to help you get into the spirit of the day, visit the Pi Day site! This site includes pi-related videos, recipes, arts and crafts project ideas, and other great activities for the class. Another must-see is the Exploratorium Museum's Pi Day site, which features other useful pi-related videos and activities.

Curious about whether your birthday shows up anywhere after the decimal point in pi? You can find out at The Pi Search Page! Sure, this page searches only the first 50 million digits of pi, but what the heck — it's worth a shot! This search engine will also show you where your number shows up after the decimal point, as well as the digits that surround your number.

Still "hungry" for more pi? Check out The Joy of Pi, a site promoting a book by the same name. Here you'll find pi to its first ten thousand digits, a pi cartoon, and links to valuable pi sites around the Web.

- Subjects:Algebra, Theme Days, Weeks, Months, Spring Themes
- Skills:Online Sources