Middle school math classes celebrated Pi Day, making "Pi-Kus" (haikus about pi), "Pi-Lages" (collages of circular images), decorating round cookies to show circumference and diameter, using string cut to the diameter of a circle to measure the circumference, and—naturally—eating pie. Some even competed in a pi recitation contest, to see who could recite accurately the greatest number of pi digits. "I think the students really enjoyed the day," said Alison Frank, math teacher. "Of course, the pie-eating was a huge hit!" The first-ever Pi Day celebration took place at the Exploratorium in San Francisco, the inspiration of now-retired physicist Larry Shaw.