Seems like DeeDee's idea is good.

How is the math text's quality? If it's anything like the 4th grade math book my DD is using, the word problems are often really terrible. My DD has zero problems with anything computational, but she gets some word problems wrong. When I look at them, I know why. I don't know what the hell they mean, either. Her text is also heavily reliant on a lot of artificial vocabulary and rules that are slow and frustrating for an inherently mathy kid who can look at the problem and see the answer without doing any of that.