I agree with GeoIzz, when my verbal super reader, super science kid, was showing o Interest in math, it finally dawned on me with some help from here, that he needed to be reached from his comfort zone - so books, stories, first like the ones Geofizz recommended then progressed to the murderous maths. I also just heard Danica McKeller on the radio talking about her books for the tween set - the first one is called math doesn't suck and seems to be trying to reach girls where they are and throw math into that, sounded really good but might not be where your dd is right now.

DeHe