What is it that you are looking to achieve with this? Do your kids need a bit of extra help with the current math curriculum? Or do you simply want them to be ahead of the curve?
I don't want to over-complicate this, but my parents put me through Kumon/Brainchild to help me get ahead of the curve, but it did not help me with the math curriculum I was currently in, and I struggled a lot. I wished that my parents got me a math tutor to help me with the school material, instead of putting me into a storefront math program. My parents weren't able to recognize the difference, but they know now...some 20 odd years later.
