If this post works then you should be able to scan it, create your own and find a use for QR codes in your own practice.
Scanning a QR code
On your PCWindows 8 - Easy QR
Download for desktop - Quickmark
On your Phone/TabletAndroid - Google Goggles
Apple - QRreader
Blackberry - QRreader
Creating a QR code
Anything from a simple line of text to a website can be accessed via a QR code. To simply create a QR code that will go to a line of text use Kaywa, which will also convert web links to QR codes too.
Possible applications in Education
Accessing information around the classroom
Treasure HuntsThis link takes you to a site where you can create a treasure hunt of QR codes. By using this you can send students on a classroom/whole school adventure using their phones to scan the QR codes and access questions or clues.
Click here for an extensive set of possible uses of QR codes in education.
Mr B Rouse