Robin got to the point with using his brother's beginning-of-1st-grade math sheets where I felt it was too difficult for him. Hence, we have (a little early) got him Saxon Math K, and started using it! It is a little basic for him, but I feel like he needs a bit of extra foundation in the basics. I asked him tonight if he liked it and he said it was a little too short. But agreed that it was better for it to be too short than too long.