Students and teachers at the John D. O’Bryant School of Math & Science joined math enthusiasts around the world today in celebrating "Pi Day" -- March 14th, or 3/14. The Greek letter Pi (shown here), which equals 3.14159… and continues without stopping or repeating, is the mathematical symbol for the ratio of the circumference of a circle to its diameter. Sporting Pi Day t-shirts (pictured below), O’Bryant teachers organized special classroom activities, including a Pi recitation contest to see how many digits of Pi students could memorize. The winning student's prize? A pie, of course!