Jacqueline asked me to post this
QR Code generator:
http://zxing.appspot.com/generator/
Maybe QR codes can be used to give individual students access to answer keys on the overhead screen in class, once they have completed an exercise.
Or if students are out in the field, QR codes can be placed at specific locations that they need to get to, giving hints to the next location they need to find (treasure hunt).
Could QR codes be used to enhance learning and improve access to learning resources?