I attended an interesting session yesterday about using QR codes in the classroom given by Jennifer Shafer Wyatt (Twitter ID: @jen_librarian). When I gave my poster presentation at AERA, I included a QR code to link to the paper, but I now realize how much more I could have used it for - to link to video or pictures to extend the poster with multimedia. I definitely want to explore this idea more in future presentations. But, I began to see the usefulness of QR codes in my own classroom - to link student created podcast reviews of books to the book itself (with a bookmark & QR code) or to have station work that is linked to media and instructions via QR code which would reveal the information when the students were ready for it. Jennifer provided several videos that showed ways to use QR codes and this is one of the better ones - Black & White and Scanned All Over.
I did some other looking and found a neat one about using QR in Elementary - what is especially interesting is that the video is narrated and designed by the students.
Now, QR codes aren't a new idea, but schools have been slow to catch on, mostly because student cell phones are generally banned. Here is a great blog from 2010 about using QR Codes - implications for teaching and learning.