Practice your subtraction table and every day subtraction problems. Ask your parents to write problems for you in the spaces provided on the back side to challenge you. Check your answers with your parents. You can work more challenging problems as your subtraction skills grow. Tot Talk's double sided, educational placemats are thick and high quality. Use washable markers, and wipe clean with wet paper towels, or wash with warm water and dish soap for bacteria free learning. For extra fun, give your child a spray bottle, and they can spray it, and wash off their work and start over.