Students start at any QR code. They scan the code to get an equation. They solve the equation on their work paper, showing all work. When they get the answer, they have to find their answer on a different card in the room. The QR code will give them the next equation to solve. If their answer isn't on a card, they have to try their equation again. When they get back to the QR code/equation they started with, they have successfully completed the scavenger hunt. If they get back to it before they have gotten to all of the equations, they made a mistake and need to look back over their equations to figure out where.