I found Rightstart Math while searching for a program to use with my youngest child who is a very right brained (visual spatial) learner. Rightstart uses a special simplified abacus to help children "see" numbers as quantities. The program also incorporates singing, workpages, tally sticks and other manipulatives, and lots of games to instill mathematical concepts on a deep level. I was so impressed with it after seeing a demonstration at a local conference that I decided to also take 11 year old back through the program as well as she had started to hit that "math wall" with what we were previously doing and I want her to understand the concepts more completely. Rightstart has levels that go up through Intermediate math which includes geometry. It is hard to correlate this with an exact grade but at that point the company recommends going into Videotext Algebra so it covers all of the math the student needs previous to that. There is a homeschool forum at the Rightstart Math website as well as a yahoo group that is very helpful. http://groups.yahoo.com/group/RightStart/