Another book we are really digging is Life of Fred. I have a daughter that absolutely hates math. I am not saying that she loves doing this book, but it is electic enough to peek her interest, sometimes. The only gripe I have is not enough problems for memorizing a concept. I periodically have her do more problems if needed. I would recommend Life of Fred for those learners that are just not math lovers. We are currently using the Fractions book and are about halfway through, the next in the series will be Percents and Decimals.