As you move into the second book in the intermediate range, Life of Fred - Liver, will continue to entertain and educate your children.
In the beginning of the textbook, Stanley F Schmidt PhD says: "There are good ways to teach arithmetic, and there are bad ways." What you will not find is:
Here's how you do this, and here are 30 sums.
What you will find is maths being part of everyday life, and Fred's life is the vehicle.