Potentially useful application for Windows, Mac, and Linux to read QR Codes, includes detailed instructions on how to use the program (assuming your computer has a camera)
A period table of QR codes which link to short video clips from the University of Nottingham which explains the properties of each element. A must for every Chemistry 2.0 classroom wall.
http://ictmagic.wikispaces.com/Science
"A superb online whiteboard suite of tools, including a random name picker, classroom sound level indicator, display a QR code, drawing and text tools, traffic lights, timers, clocks and dates, and even a fab exit poll tool. You can even change the background, including your own images to display extra resource information, or use your computer camera to show live video like a visualiser."
"An amazing feedback app. Create QR codes and attach audio feedback for students/parents to listen to. QR codes are emailed to you after requesting them from the app. Glue into books to evidence your feedback. Get your students to reply to begin a conversation about their work."