She's doing fine in school. She has no gaps. To me this means you don't need to pile on more to bring her up to her potential as measured by the IQ.
She's verbally gifted, and doesn't care for how math's being presented at school. I wouldn't add more of the same in hopes of improving the situation. How about working with the talent instead?
Check out books like the Sir Cumference series, read The Number Devil together, Anno's Mysterious Multiplying Jar, listen to The Math Dude's podcasts, and watch the Art Benjamin Joy of Math videos (we got these at the public library, but otherwise they go on deep discount ~twice a year).
These won't augment the 2nd and 3rd grade skills, but they'll make math interesting or entertaining, and it will help develop mathematical thinking.
