How do I use the QR barcode I see in my book?

The QR code you see will link to content of your professor's choosing. First get your camera enabled device (whether it be a tablet or a smartphone, iOS or Android), and make sure you have a QR Reader installed (we suggest Neo Reader or QR Reader but any will do), open the application and scan the QR Code and you will be brought to the correct content on your mobile device.