If it were me, I would not do a math curriculum. If you do that and they won't accelerate her in school, it's just setting her up to be bored. I would try some of the math books that extend and really teach the concepts in depth.
I would suggest:
Zaccaro's Primary Grade Challenge Math
Life of Fred elementary series
Art of Problem Solving early series
the Singapore Challenging Word Problem books and also their Math Express SpeedMaths books
Beth, mom to older DD (8/01) and younger DD (10/06) and always missing Leah (4/22 - 5/1/05)