I know boys and girls are different, but my DS6 (who usually gets distracted when expected to keep doing problems ... and quickly) really responded to video game type math facts. There are some at funbrain.com, and arcademicskillbuilders.com; DS seems to especially like racing or space versions.
I heard that Timez Attack is good, but I haven't tried it because you have to buy it to get the full version...might be good to start with the lower numbers and see if she likes it.

For me, GT means Georgia Tech.