I was very excited to see that Intel has created an app for their visual rank program. My students used this several weeks ago to rank the importance of different size rocks, but at that time they used laptops.
This week they used the app to rank the importance of resources--natural, human, and capital. This is a topic that fits with our social studies curriculum. After ranking they commented on how they determined the order. Finally, when all groups were finished they were able to compare their results with the results of other groups.
The program works equally well on the laptops and idevices. I had students use iTouches this week simply because I had more of them available--first grade students were using laptops and ipads.