This would be great for a review at the end of a unit. It really does not need to be math. You could make up review questions and then packing tape them to the Jenga blocks. The QR codes could be made easily from many different sites. See my post on February 22 2013 by clicking here. You need a website to host the solution that QR links to but our board has free webspace for all teachers or you could use a free easy service like Tackk. You do not have to register with Tackk but your pages expire after seven days. Better to just register for free. Another way would be to set up a free blog at blogspot.com and just put in a bunch of posts, where each post is an answer. Each of these posts would have a unique URL. Just a thought.
To play. There are several different ways. One way to play would be to have the team/person who gets a wrong answer to keep pulling blocks. If you are correct, the other team goes. Whoever drops the stack loses. I am sure you can come up with other ways of playing.
The QR codes are just to keep you, the teacher, out of the loop of being asked if they are right or not.
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