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# Welcome!

## Celebrate Pi Day - March 14th

Pi is a one of the most commonly known irrational numbers. It represents the ratio between the circumference of a circle (the distance around) to its diameter (the distance across). Because Pi  is an irrational number, it is impossible to calculate exactly, but in any circle the circumference is approximately 3.14 times its diameter.

Pi Day is celebrated annually on March 14 and especifically at 1:59. This is to commenorate the first few digits of pi which 3.14159.

 Below are some great web sites to use a resource in finding out more about Pi Day and fun activities for a variety of ages. Teach Pi This website claims to be the first and best place on the Web for teachers who want to find or share ideas for Pi Day activities, learning, and entertainment. They state, "We believe that promoting an enthusiasm for learning, through celebration and creativity, will lead only to a richer classroom environment and a deeper appreciation of mathematics." http://www.teachpi.org/index.htm Scholastics Web Site This site offers ideas for teachers. http://www.scholastic.com/teachers/article/march-14-pi-day Exploratorium:  The museum of science, art and human perception has an article on the history of Pi. http://www.exploratorium.edu/pi/history_of_pi/index.html The Math Forum - Ask Dr. Math Dr. Math is created by Drexel University to answer all your mathematics questions. http://mathforum.org/dr.math/faq/faq.pi.html Wikipedia's informational page on Pi. http://en.wikipedia.org/wiki/Pi Education World http://www.educationworld.com/a_lesson/lesson/lesson335.shtml