**Definition of Pi: **The
letter π, used as the symbol for the ratio of the circumference
of a circle to its diameter, the ratio itself: 3.141592+.

**Free Interactive Pi & Pi Day
Games & Activities for Kids: **Pi Land,
Pi Day Edition - Are You Smarter Than a Fifth Grader:
Pi!** **

**Lesson Ideas for Teachers:**

Introducing
Pi! Actively engage students in learning activities that promote
opportunities for students to discover the 'meaning' of pi.
Activities include research, hands-on, software applications,
reading, writing, and collaborative work opportunities, and spark
enthusiasm among students for our celebration of 'Pi Day'. Lesson
details

**Free Presentations for Pi &
Pi Day**

Pi!,
Pi Day, Circles and Pi, and More - Several Free Presentations in
PowerPoint format for Pi and for Pi Day

**Free Apps: **

Free
Math iPad Apps for Kids