Freebie! •Students copy and extend the patterns for these 18 cards using a manipulative material. The beauty of these AB, ABC, and ABCD pattern cards is that they can be used many times, each with a different manipulative from your classroom. Each manipulative material and repetition can enhance the interest and learning. Your students will love to use links, cubes, colored counters, teddy bear counters, or any other materials you have in your room.