Plickers is a new Student Response System that I just found out about from Richard Byrne's award winning blog. The way this works is students are given a unique QR code, the teacher asks the questions, and the student answers by showing the QR code to the teacher's smart phone. Simple, easy, and all the educator needs is to download the free mobile app (iOS/Android) to assess students and get instant real-time results in a bar graph.
I highly recommend checking out Plickers by clicking here!!!
Below is a brief demo...
For my Pinterest board on QR Codes click here.