This Loop Puzzle consists of 15 questions that have to do with a combining like terms. (Ex: 5xy + (-3xy) + 2b - 9b).
I run my Loop Puzzles in the hallway and have each student work through the whole thing. They start at any page by scanning the QR code which gives them the question. They then work the question and get an answer. When they have an answer, they then go to look for that answer around the hallway. When they find it, they scan the QR code on that page and start the process again. It should work out that they end up where they started. If they end up back at the same question before they've completed all 15, they did something wrong.
My 7th graders really love these activities!!