Quick question about math resources. I'm looking to pick up some stuff to have around this summer for DS6, who loves reading and is super mathy. I'm thinking of Life of Fred. The author recommends starting at the beginning, but I don't want to spend the money if he'll end up not using them. (He's strong on logic and got a 160 on KTEA math, but hasn't done any times tables yet.)

Would you start with Apples? jump ahead? Any other recommendations?

Thanks, in advance!