Kumon My Book of Simple Subtraction-Revised Edition-Same Trusted Kumon Method Now with Added Content-Ages 6-8

I really like these books. I have been using them for homeschooling. They are fun and easy to understand. There is enough material and repetition for the kids to learn the skills. I like the fact also that there are Kumon centers that you can register in as well. I am sad that they only go to grade 6. This makes teaching easy and learning fun!