Khan academy is a great resource for your child to learn math. It was actually started with the realization that kids like to learn at there own pace, not being waited on by a tutor or teacher for them to understand the subject.
My son would have gotten nowhere with Kahn Academy on his own, he needed quite a bit of tutoring to get up to speed, but it was something I could do, and the curriculum, problem sets, and mechanisms for tracking progress are invaluable.