I was given a free trial of
thefactortree.com a new online math program through BzzAgent. As a homeschool mom with lots of kids, I was hoping this would be something wonderful for math like Readingeggs.com has been for reading. Unfortunately, it did not meet my expectations. The program is boring, like a bunch of worksheets that never end. Even my worksheet, busy working daughter was bored. I've tried lots of programs to motivate kids to learn, and this is one I would avoid! Unless they add something engaging and fun to motivate the kids, I'll stick with worksheets. At least then they get a sticker.
Another math site that is pretty good is ALEKS.com, but it only starts with 3rd grade. It is also problem focused, but at least gives the kids some choice about what topics to cover!