Well I suppose we will have to part ways on that one.
I still think that once a good solid basis is set, that any half-way bright kid will see his way to extrapolate, interpolate, or do whatever he has to. I may not've learned what a whole number is, haha, but I could solve the heck out of a high school physics problem...
And as I said, in comparison to other books. Have you seen other texts besides Saxon?