Vector Racer–Teaching Slope

Dan Meyer has a great blog. It has served as an inspiration for my teaching and has some great and creative ideas for teaching math. Race Track is a game to familiarize students with the cartesian plane (and some basic physics principles) by racing around a track. http://blog.mrmeyer.com/?p=2008. A more precise description is given here http://en.wikipedia.org/wiki/Racetrack_(game). This is also known as vector racer and there are online versions.