I've heard of QR codes and have seen them used in mobile advertising. I've even heard of some really good ideas on how to use them in class, including a QR code scavenger hunt. Our school is 1:1 with iPads in grades 9-12, and I've been pondering for a while on how I could use QR codes in my own classroom.
As we approached Ch. 6 & 7 of Huckleberry Finn, an idea struck me. In those chapters, Huck stages a crime scene to make it look like how he was murdered. Brilliant, I know. But most students don't see his genius behind this. So I decided to do a QR code crime scene prior to reading these two chapters.