Teachers in many classrooms celebrate Pi Day this month. Pi  the number 3.14… gets its own special day on 3/14, or March 14. EdWorld editors have gathered a collection of links to ideas and activities that will help you plan a Pi Day celebration for your classroom or school.
If one day of the year screams "Party!" in math class, that day is March 14. Each year on 3/14, teachers in classrooms across the globe take a break from the normal routine to plan a special celebration in honor of pi, or the number 3.14.
March 14 also happens to be the birth date of Albert Einstein  which makes the day an extra special one for planning math challenges and math fun!
According to Dr. Math, Pi Day activities are meant to enrich and deepen students' understanding of the concept of pi. Activities might include investigations of the value of pi, special pi projects, and parties with pizza or other kinds of "pi."
Because pi is 3.14159…, some schools hold their big Pi Day celebrations 3/14 at exactly 1:59 p.m.
Education World editors took some time to surf the Internet in search of ideas around which teachers might build Pi Day celebrations. The resources below offer a library of great activities, lesson plans, and other resources to help you celebrate Pi Day in style!
We have gathered more than two dozen links to Pi Day activity ideas. (Appropriate grade levels for each lesson resource appear in parentheses.)

Circumference of a Circle Lesson
Great Pi Day Activities for Teachers
Pi Day Lessons from the Math Forum (Grades 58)
Making a Pi Necklace (Grades 58)
The Derivation of Pi (Grades 68)
Proving Pi (Grades 912)
Buffon's Needle: An Analysis and Simulation (Grades 912)
Monte Carlo Estimation for Pi (Grades 912)
Pi Day in Math Classrooms (Grades 812)
Pi Day Ideas from Mrs. Highley (Grades 412)
Pi Day Connections (Grades 612)
PiQuest (Grades 78)
Circles in Geometry (Grades 35)
Pi Day Activities (All grades)
CrossCurricular Activities for Pi Mathematics (Grades 58)
Pi Day Activities for Trigonometry Classes (Grades 912) (archived copy)
Pi Day Activities for Algebra II Classes (Grades 912) (archived copy)
Pi Day Greeting Cards from 123Greetings.com
Ask Dr. Math: Middle School Pi
Archimedes and the Computation of Pi
Graphics for the Calculus Classroom: Archimedes' Calculation of Pi
Let's Take Another Look at Pi Day
Article by Gary Hopkins
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