Classroom Clickers in a Low Tech Classroom

Have you ever seen examples of classrooms with clickers? Have you tried to figure out how you could get your hands on a set? Donations? Donors Choose? Second job? 
Now you don't have to as long as you have paper and one device - a smart phone or a tablet will do.
Plickers is an iOS or Android app that the teacher uses to scan student cards. Each student has a paper card with a unique visual code. The code has four sides labeled A, B, C, and D. The student turns the card and holds it up for the teacher to scan. The app scans the codes, records who the teacher assigned each card to, and captures the answer each student chose.

What an amazing app! You don't need to be a 1to1 class, you don't need a set of ipads or clickers, you don't need to share devices among kids, all you need is paper. The cards can be scanned from a distance so the teacher could stay in front of the class and just scan the group while they hold up the cards.

Image from https://www.plickers.com/support

Check it out. https://itunes.apple.com/us/app/plickers/id701184049?mt=8