http://mathforum.org/t2t/faq/faq.pi.html

This year, March 14 falls on a Sunday, so many teachers will honor Pi Day on Friday or Monday instead. If you are looking for some ways to celebrate math in your math class, or if you would like to suggest some school-wide thematic activities, you are certain to find ideas on this page to help you design a Pi Day that students 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!

Pi Day at the Exploratorium

http://www.exploratorium.edu/pi/

San Francisco's Exploratorium's 22nd annual Pi Day celebration might give you some ideas, even if you're not in the area to party with them.

• create Pi puns
• participate in activities, rituals, and Pi-related antics
• have a slice of pie!

Pi Day also takes place in Second Life, where the Exploratorium runs a virtual museum called 'Splo.

http://www.exploratorium.edu/worlds/secondlife/

http://maanumberaday.blogspot.com/

Every working day, the Mathematical Association of America (MAA) posts a new positive integer, with a selection of its properties and an illustration or photograph.

What's Special About This Number?

http://www2.stetson.edu/~efriedma/numbers.html

Erich Friedman lists the integers from zero to 9,999, annotating each with one significant mathematical property and color-coordinating by that property's category.

High School: http://mathforum.org/students/high/opps.html

Middle School: http://mathforum.org/students/middle/opps.html

The Math Forum maintains an annotated list of math camps and summer programs. It links to residential opportunities, some just for girls, in states that include

• California
• Colorado
• Maryland
• Massachusetts
• Minnesota
• New Jersey
• Ohio
• Texas
• Washington

Many opportunities occuring this summer have application deadlines already coming up soon.