Russian Math for 4th grader?

[mommy111]

Any books/curricular resources that you would recommend? Dd has a horrible math curriculum in school that is just not building her concepts. She scores well but doesn't really have any strong conceptual basis of what she does and just 'wings it'. We've done Singapore math with her up until last year, but let off a year ago and she's lost her skill. I've heard rave reviews about the Russian math curriculum but aam not able to take her to a Russian math school, so I was wondering if there are any books out there that we could look at.
Thanks so much!

[buttercup]

"Russian school" (weekend classes) in my area use the Singapore curriculum as far as I recall from last time I looked into supplementing math.