These cards include vocabulary words and definitions for living systems. We are required to include a science or social studies center in our power-up time each day, so I printed and laminated these for the students to use. They are allowed to either match the words to their definitions or place a memory game with a partner using them. They are perfect for a quick review throughout the year! It is also something that can be quickly pulled if a student finishes an assignment early. You could also use them for a vocabulary bulletin board while teaching the unit!