QR codes are hung up around the room, each linking to a different scientific notation review problem. There are five different colors representing the five olympic rings, with each color representing one of 5 targets (adding/sub, mult/dividing, word problems, converting to scientific notation, converting to standard notation).
By using their own device (ipod, ipad, smart phone, etc.) student find the QR codes around the room and scan them, then use the follow along sheet to organize all of their answers.
Depending on the number of correct answers students get, they get to sign their name to either the gold, silver, or bronze medal column.
Great review that kids have a lot of fun doing!