Pi Day Is Coming


Pi Day Is Coming

March 14 is Pi Day . On March 14, 1988, a physicist, Larry Shaw, organized the first Pi Day at the Exploratorium in San Francisco, California.


Photo Credit: Wikipedia

They continue to hold Pi Day celebrations today, marching around a circular space and eating fruit pies.

Now many schools across the country celebrate Pi Day, its date fixed by the closest and most common representation of the number Pi, 3.14, or the Friday before.

Activities shared range from cutting out circles, to bringing in fruit or pizza pies or cookies, to assigning the numbers 0 through 9 a color and stringing beads or paper chains representing the colors of pi, without repeating a pattern.

Teachpi.org has assembled some of the activities teachers have shared.

They include:

  • Write numbers on index cards and have students string them, in order, down a string in the hallway.
  • Hold a contest for the most number of digits of pi students can recite from memory.
  • Write two digits of pi on each of a number of index cards, shuffle, have students pick out a card and assemble themselves in order of pi
  • Tell stories about pi, like the one about the Roanoke, Virginia teenager who broke the 1979 record in 2006 for most number of digits recited and landed on the Pi World Ranking List

MIT posts its decisions, privately, about applicants for the next year’s class on Pi Day. Princeton combines its celebration of Pi Day with Albert Einstein’s birthday, also March 14. Pizone.org, a family-funded non-profit, posts pi-related activities and news, such as their photo of the sky on September 12, 2012, when five sky-writing planes coordinated to write 1,000 digits of pi. They include a banana measurement activity to illustrate pi.

  • Cut off the bottom of a banana.
  • Cut four slices from the bottom half
  • Peel the four slices
  • Slice open the peel, lengthwise, of the top half of the banana
  • Lay the peel out flat
  • Line up the slices, end to end across the width of the peel

It should be wide enough for three slices, side by side, with a little left over. That’s pi, the ratio of the diameter of the banana, represented by the slices, to the circumference, represented by the laid-open flat banana peel.

Enjoy your banana!

Did you ever wonder what pi was, besides a formula you had to memorize? Did you know your grandchildren might now be celebrating Pi Day? What was your favorite school holiday?

To you and celebrating the wonder of the world with your grandchildren.

Carol Covin, Granny-Guru, Author, “Who Gets to Name Grandma? The Wisdom of Mothers and Grandmothers” http://newgrandmas.com

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Comments (5 )

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  1. JeriWB says:

    I love the scene in the movie The Life of Pi where the main character takes ownership of his name. The math teacher at my hold high school would get more than a few pies on Pi day. Students really love her…. she makes math fun.

  2. carolcovin says:

    I clearly went to school too soon. Pies at school for math! Love it!

  3. Susan Cooper says:

    I love this. I would have had a blast with this as a first grade teacher.

  4. I only recently learned of Pi day a couple years ago. Of course the people I heard about it from were both math geeks (one of them just got his PHD in math theory or some such).

  5. carolcovin says:

    I always loved math because it was so clean. Not messy, like science. But, now, I like finding activities that help you visualize the underlying math principle.