Each year on March 14th many classrooms break from their usual routines to observe the festivities of "Pi Day." The digits in this date correspond to the first three digits of Pi (3.14). If you are looking for some ways to celebrate math, you are certain to find ideas on these websites. Instructors and learners can design a Pi Day that everyone will enjoy.

If honoring Pi is not enough of a reason to make this day special, keep in mind that March 14 is also Albert Einstein's birthday. This year’s Pi Day is Albert Einstein’s 126th birthday. Happy Birthday, Al!

**Pi Day**

This is the place for activities relating to Pi Day!

**Pi Day—Let’s Eat Cake!**

Bring two cakes to class in celebration of Pi Day. One cake will be a rectangle that is 9 inches wide, 13 inches long and 2 inches high. The other cake will be a 9-inch-round cake that is 3 inches high. Then the fun begins!

**Pi Day page from the San Francisco Exploratorium**

This site contains many links to information about Pi.

**Einstein Revealed**

This NOVA website explores the key points in Albert Einstein’s life and weaves together history and physics. Learners are provided with a timeline, an explanation of the Theory of Relativity, and interactive explorations of time travel and the nature of light. The teachers’ guide is excellent

**Einstein’s Legacy**

This section of “Physics 2000” focuses on modern technological wonders. Some of them will be rare and expensive devices, but others will be common tools and appliances that you might even have around the house. All these tools rely on basic physics.

**Einstein, Image and Impact**

This website is from The Center for History of Physics. It provides historical background information for instructors and tutors.

**Finding the Value of Pi**

This is the Math Forum's "Famous Problems" website. Find out the history of Pi. Discover the values of Pi as calculated through time. Were the ancient Babylonians (2000 BCE) close to Pi's modern value?