In this activity students will use function notation to create a 4 x 4 puzzle. I recommend letting students do this in groups or with a partner. I have used this in my classroom and it is great with high level learners! It is a great enrichment activity and it really gives them great insight and practice into the "what" that is actually happening with function notation! I teach on a block schedule and it takes my students about 60 - 70 minutes to finish the puzzle.