This matching/domino/puzzle activity is for an introduction to implicit differentiation - BEFORE the students have taken notes, etc. Students only need to know the power and product rules to complete the activity (the question on each card matches to an answer on another card). There are easier problems that should help them figure out the harder problems. dx/dx is left in the problems to help them understand what they are doing - hopefully, they will ask about it needing to be there when they f