And that's my issue - DD just isn't that kid who picks up math by spontaneous generation. She was never the tiny child reading Harry Potter - she entered kindergarten not reading at all. She did not talk early, she does not like puzzles, she needs lots of sleep and dislikes being involved in too many activities. She's not overexcitable, doesn't do independent research, has no particular interests, sits quietly, and feels the need to "check her work" against a neighbor - even to the extent of changing her own right answer to the neighbor's wrong one. If I look at Ruf's LOG, she's far more Level One than anything else (which IMHO says more about Dr. Ruf than about DD, but people here seem to put stock in her).