This document includes the question cards, the qr codes to post on the board, and the ws for the kids to have. This link:
has prinable 25 piece puzzles. I am also going to check out the dollar store and see if they have any. My vision is that each group has a 25 piece puzzle...each question they get correct allows them to pick a piece for their puzzle. first group to complete puzzle wins. I will probably put magnets behind each piece so students can see the progress of each group.