Today I presented a session called "Using QR Code in Your Classroom or Library" for the 4T Virtual Conference hosted by the University of Michigan. I love QR Codes! I use them on my business card to give people access to my online workshop resources. There are many educational uses for them. With many districts going to BYOT, QR Code gives teachers an additional way for their students to access contents.
I use www.qrstuff.com to generate the code and my favorite reader app is i-nigma.