It is once again Pi Day (March 14—which is like the first digits of pi: 3 and 14). Before getting into this year's celebration of pi, let me just summarize some of the most important things about this ...

Hands-on projects are great learning tools for kids, especially when they involve the word ‘secret’. I can’t think of a better way to celebrate Pi Day (March 14 or “3.14”) with kids than to help them ...

One of my favorite holidays is Pi Day. On March 14, people who love the math constant called pi celebrate by eating the other kind of pie. Like apple pie, pumpkin pie and even pizza pie. I talked ...

Here's a funny story. A reporter at National Geographic wanted to find someone to interview about pi—that number you learned in grade school that is the ratio between a circle's circumference and its ...