I love Aleks.com for 'gap filling' I find it's quite cheap and I love the pie charts. I wouldn't expect it to do teaching, but more to identify which skills are in place and which skill aren't. You may want to sit with her and observe her, to see if you can analzye what sorts of mistakes she tends to make. I'd like a AI program that can do that, sort of like Amazon.com '40% of kids who gave that answer make an addition mistake at step 3' but as far as I know, that isn't availible yet.
It'll be cool when it arrives, though!
Grinity
