"While he says some teachers apparently manage to provide the necessary background, increasingly students coming into the magnet have not been taught certain math concepts in enough depth for the concepts to become ingrained."
That seems to sum up how we feel. It is our biggest concern for our daughters who show both an aptitude and interest in math. DD8 could be much further ahead, but we've tried to introduce different formats for the same concepts to alleviate boredom. Also, when she does move ahead we spiral it back and do a little re-emphasis of what she learned.
I'd love to hear what the really math savvy parents think about this issue.
In addition to BB and Dazey, of course!