Thanks to today's post, Online Game; Math Caching, by Denise at Let's Play Math, a great math resource in itself, I discovered MathBits.com.

The main page of MathBIts says:

MathBits.com is devoted to offering fun, yet challenging, lessons and activities in high school (and college level) mathematics and computer programming for students and teachers. Created by two teachers.

From this main page you can access a variety of different helps, most of which is free but some do require a subscription.

The part of the site that Denise wrote about in her post was the Math Cache Game.  The main page for the game says:

"Geocaching" (pronounced "geo cashing") is the sport of using GPS systems to locate hidden boxes at different geographical locations across the country. Directions and clues are left in the boxes to aid in the journey.

In the spirit of geocaching, we have created activities called "MathCaching" which use the internet to find hidden boxes to reveal clues to the continuation of the games. Your success at "MathCaching" is dependent upon your skills at solving mathematical problems.

This sounds like a really neat resource that could be used with highschool students to help make math more fun.  Let me know what you think if you decide try it with your children.