Gen Y is familiar with QR codes: a mobile scan the code and redirects you to a webpage.
QR Code allows to link educational elements together (a course material, a book from the library, a Wikipedia page, a specific topic of a forum, a hashtag on Twitter ...). The QR codes allows to connect things in real life as easily as on the web!
Knowing connect the items together is very important in the learning process, but also: a fun way to discover information promotes the learning path.
QR codes thus represent big benefits for teacher :)