This is a Pi sweatshirt that I bought for my daughter when we visited a science museum.
Every year, teachers celebrate March 14th with their students as Pi (3.14) Day. This year it is particularly special, because 3/14/15 contains the first five digits of Pi (3.1415)
To incorporate literacy into this math day you could read some of the following titles with your students, or challenge them to write a story about Pi that contains exactly 314 words.
And in honor of one of my favorite math whizzes, who always won the math-go-round in third grade, here is a Pi recipe:
Happy reading and eating,