QR Codes are 'new' bar codes that devices such as mobile phones, iPads, tablets etc can scan (once downloading an app that allows you to scan them) which either direct you to a particular website or provides with specific information. Commercially, QR Codes are growing rapidly and are seen in many businesses.
Slowly, schools are also integrating this piece of technology.
In my school, QR Codes are used to support administrative duties as well as classroom teaching and learning. Using QR Codes is a huge part of teaching and learning. Students are also encouraged to submit their work via a QR Code which not only encourages students to think outside the square in terms of creating their learning activity as well as simplifies marking and assessment administratively.
And for fun, we do a QR Code Hunt that is always a barrel of laughs - especially with a competitive class.
Here is an examples of students work with QR Codes