How to use QR codes?
If you have a smartphone, you can use these codes quite easily. All you have to do is download a QR code scanning app from your device’s app store, open it and use it to take a picture of the code. It’ll decode the QR code and then do the action the QR code is asking you to do.
Here is a list of good QR code scanners for each of the major mobile operating systems with direct download links.
AndroidGoogle Goggles
BlackberryFree QR Code Scanner Pro
iOS (iPhone/iPad/iPod Touch)Google Goggles
Windows PhoneQR Code Reader
MeeGoMeeScan
Again, once you have the app, simply open it on your phone and it should have a scan option that will look like you are looking through your device’s camera. Simply aim at a QR code and scan.

(For more information about how to use QR codes visit: http://theunlockr.com/2012/10/19/qr-codes-what-they-are-how-to-use-them-and-creative-examples/)

Conference Evaluation QR code
conference eval qr code.jpg

Session Evaluation QR Code
Session eval qr code.jpg

SCOLT14 Unsession survey QR code
Unsession survey qr code.jpg