Pi Day 2015 is finally here! We’re celebrating at MathTV with a video playlist, a t-shirt giveaway, and a special visit from PI ITSELF.

## Pi Day 2015: Pi Point and Counterpoint

In celebration of this year’s Pi Day of the Century, we created a bunch of videos about pi—and we dug up some other great resources for you as well. Happy Pi Day!

## Pi Day 2015: Pi in the Classroom

There’s a lot you can do with Pi in the classroom. Here are a bunch of resources for you to celebrate this year’s once-in-a-century Pi Day!

## Pi Day 2015: Pi Origins and History

Let’s start our Pi Day celebration off the right way—at the beginning. What is pi? How did it come about? And why is it important?

## The Pi Day of the Century

On Saturday, 3/14/15, at exactly 9:26:53 am, the date and time will match the first 10 digits of pi (3.141592653), in sequential order. Unless you live another 100 years from Saturday, you won’t see this happen again in your lifetime!