Did you know March 14th (3.14) is Pi Day? Π is the symbol used to represent the ratio of the circumference of a circle to its diameter and is our favorite irrational number! And Albert Einstein was born on Pi Day. How cool is that! Whether you teach geometry, algebra, general math, trig or calculus, everyone loves Pi! Here are a few Pi items to help you celebrate and spotlight this important mathematical day—Pi Pencils, Pi Posters, and everything circular! Order today to ensure pre-Pi Day delivery.