Earlier I posted a blog about what a QR code is. But how do you USE a QR code? You will need a QR code reader. When you use your QR code reader on your cell phone it should launch the webpage that the QR code is pointing to. On my iPhone I use the Google Goggles app. When doing a Google search you might notice a camera icon. Google Goggles allows you to search by taking a picture of something. You can take a picture of the Starbucks logo and it will take you to the Starbucks website, take a picture of a landmark to find more information on the landmark… Click on the camera icon in your mobile Google search and take a picture of the QR code and the website will be launched.
If you want to snap QR codes from your webcam, you’ll have to install some software.
Here is a slideshare by Jason Seliskar on QR codes in the classroom