now I feel guilty because I wasn't planning on doing anything since 3.14 is on Saturday this year.

This was a blast last year!

1. My students had to earn slices (slivers, really) of pie by passing off all their circle formulas at centers. As they finished they colored in a 15 degree "slice of pie." We had already listed the types of pies they would bring and decided on a color coding system, i.e. green for key lime, orange for pumpkin, etc. This also made it easier to serve the pie on PI day. They had to compute the area for the amount of pi they earned in order to get a plate and a fork. They loved it!! Plus, they really remembered the formula for end of year testing in May!

2. We made PI necklaces and held on the spot challenges to see who could repeat the most digits correctly.

**Geometry **
**Value Of Pi (π) **
**Count the number of letters in each word:**
**Pi (π) to 7 decimal places:** (Word lengths are digits)
May I have a large container of coffee?
3.1415926
**Pi (π) to 10 decimal places:** (Word lengths are digits)
May I have a large container of coffee ready for today?
3.1415926535
**Pi (π) to 12 decimal places: **(Word lengths are digits)
See, I have a rhyme assisting my feeble brain, its tasks oft-times resisting.
3.141592653589
**Pi (π) to 30 decimal places:** (Word lengths are digits)
Now I, even I, would celebrate
In rhymes unapt, the great
Immortal Syracusan, rivaled nevermore,
Who in his wondrous lore,
Passed on before,
Left men his guidance
How to circles mensurate.
**and another one also to 30 decimal places (written by Michael Shapiro) **
Now I will a rhyme construct
By chosen words the young instruct.
Cunningly devised endeavor,
Con it and remember ever.
Widths of circle here you see.
Sketched out in strange obscurity.
3.14159265358979323846264338327 95............
3. We did the EdHelper units on Sir Cumference and the Knights of the Round Table and Sir Cumference and the Dragon of Pi. EdHelper is a subscription service, but there are tons of PI Day stuff online.

4. Students brought in cans and jar of varying sizes and measured them with string. See page 3 in this link:

http://community.learnnc.org/dpi/mat...s_68_resou.php
5. Memorized Mnemonics for Circle Formulas.

**Find the Area and Circumference of a Circle. **
Tweedle-dee-dum and Tweedle-dee-dee,
Around the circle is pi times d,
But if the area is declared,
Think of the formula π "r" squared.
***Around the circle" is the circumference.
Circumference = π × d (diameter).
Area = π × r(radius) squared.
**Area Of A Circle **
Apple pie are square: A = π × r2
Apple pie are round: A = π × r × r
**Circumference Of A Circle**
Cherry pie delicious!: C = π × d
I'd love to hear what you are doing, as well.
NeeCee