My school does not allow students to use cell phones in the classroom. I don't agree with this policy, but rules are rules. However, assigning homework outside the classroom will allow your kids to learn a new way to use their smartphones, since texting seems to be the only thing they love to do. In June 2011, I did a post explaining QR Codes. With this post, I have put together a large listing which includes lesson ideas, QR apps for smartphones and QR code generators. Best part of all? The resources are free. The ideas are free. And if your school allows cell phones in the classroom, you'll be able to liven up your lessons!