This quiz-quiz-trade activity gets the students up, and moving around the classroom while practicing criteria for congruent triangles. It can be used as practice for new material, or as a quick review before a test. Be sure to print double-sided so that the answers are on the back of the cards. Each student should have their own card, and they should be mixing around the classroom looking for another person who needs a quick partner. They meet, greet, quiz each other on the card they are holding, then trade cards. And, they are off to find a new partner!