We use SOS and love it. My only suggestion is if you get it make sure to make it so that the kids have to answer all the questions other wise it will only grade the questions they did. So they could get an a on a test and only do one problem.
I've heard great things about it from local friends who have homeschooled through high school using SOS. Ds7 will be starting it next year for 3rd grade.
No I never even heard of it
Thanks for posting this. I am considering this for my 4th grader in the fall.
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