Ultimately what matters is time spent doing math. In the short term this seems to have created a powerful motivation for his daughter to do math, which is somet

Ultimately what matters is time spent doing math. In the short term this seems to have created a powerful motivation for his daughter to do math, which is something a lot of parents would kill for. If in the long term this were to somehow remove motivation for math then you'd be correct. However I submit that the 'beauty' in math is discovered farther down the line and that if you've already got basic sums and multiplication under your belt from hundreds of hours of repetition the barrier to entry is much much lower.