Having a smartphone is amazing. You can replace so many things with one, and they will do so much for you. I recently decided to use my phone as a fitness tracker, something I can definitely see happening in schools, with the large focus on obesity and fitness. I downloaded the free Runkeeper app. While I usually use my Cowon S9 for my playlists, I decided to take my EVO and track my run with the GPS. I did this for a few runs lately and LOVE what I get. In the image you can see my distance, the duration, my pace and speed. How many calories I burned as well as a Google Map showing my run. SO COOL! And this is just one of the apps out there that do this. You can also measure bicycling and other things. Great tool to use in your class or for your personal life.