Pi Day is My Favorite Holiday!

Not only does it happen twice a year, but it's a holiday that celebrates Math! It happens once on March 14th (3.14 the decimal approximation) and then again on July 22 (22/7 the fractional approximation).

Download my Pi Day design for your smartwatch for free!
Or order my Pi Day T shirt 

Things to do on Pi Day

K-12 Activities
​ (Most can be adapted for any level)

Pi Day: The Other Math Holiday! (PDF)
teachpi.org activities
Suggestions submitted by piday.org readers
Brain Pop episode
3.14 Trivia Game  
NCTM Pi Activities
Pi Day Lesson Plans
Pi and the Fibonacci Numbers
Monte Carlo Estimation for Pi (statistical modeling)
The Irrational Webquest
Pi Day Challenge
Wiki How to Celebrate Pi Day
Take the Pi Day Challenge
Pi in the Sky (via NASA)
FREE Pi Day (March 14th) T-Shirt Design Idea, Project Sheets

More Great Pi Resources

piday.org
teachpi.org
joyofpi.com
exploratorium.edu/pi
eveandersson.com/pi
spiritart.org/Numbers/Pi
library.thinkquest.org (via Wayback Machine)
megsl.org/pi

piday.org on Facebook
​
My Bookmarks: Pi

Videos and Songs

Pi Rap
The World's Most Mysterious Number
Pi Day 2007:  Pi Another Day
MathematiciansPictures.com Pi-Day 2010
Amazing Pi Sand Art 
Pi is an Irrational Number- Star Trek clip
Pi Day Tribute:  In Love with Pi
Can You Imagine the World Without Pi
Why We Need Pi
The Number Pi Challenge
e + pi

Even more Pi

Million Digits of Pi
Billion Digits of Pi
Pi Poetry
A chronology of Pi
Pi Trainer for memorizing Digits
Mentat Wiki:  Pi Memorization
Pi Searcher
National Pi Day Legislation (and the Pi Day Bill)
Pi (Wikipedia)
Typing Pi on the Keyboard
Behold the world's geekiest artwork: Pi in the sky to 1,000 places
Pi Photos on Twitter from 2014
Visualization of the first 1,000 digits of pi

Even More Pi

A meandering tale: the truth about pi and rivers

Visit the tumblr I set up to capture Pi Day Tweets (2013)