Working through Study.Com courses?

[dfrecore]

I am working my way through Khan Academy for "fun." Really, just to keep my brain going. I do the Mastery Challenges for a grade or subject until they stop giving them to me, then switch to another grade/subject; and with overlapping info between the grades and subjects, I've covered a ton of math (all of the lower, but still working on Pre-Algebra through Geometry (or 5th-8th). I just keep plugging away, and get through chunks when I feel like it, then take a break, then come back to it. I do more over the summer for some reason.