COUNT & ADD (Arithmetic Book 1): This series contains 5 arithmetic books, by Dr. Wise, for preschoolers and first graders. Count & Add, uses dots and the Roman Numerals V and X, making it possible for the child to count and add with ease. Mothers need to guide their child through the exercises in the workbook. If your preschooler can count to 20, he will have great fun and have a feeling of success working this series. If he cannot count to 20, there are many other things to learn. Counting dots is far better than your child counting numbers using his fingers, as he learns to visualize numbers being added together which helps him become accurate.