March 13th, 2008
10:38 PM ET

Happy Pi Day!

Friday is 3.14.2008. And that means it's Pi Day.

No, really. Every year, people actually celebrate that little number with lots of decimal places on this day. You can read all about it here. And teachers, there are some ideas for Pi Day classroom activities. If you try any out, let us know how you did. Take a pic, and send in an iReport.

Enjoy the pi.

Gerald Smith, CNNSN Producer

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