Math tutoring software for Mac OSX?

This is kinda embarrassing, but. I'm trying to get my GED, and due to personal and family reasons I was never able to attend High School, ever. I'm not "dumb" but need a LOT of help. I was wondering if there are any highly recommended tutoring software for Mac OS (Intel)? More importantly on math, I can get around everything else just fine but need a lot of help on math.

Thanks in advance to anyone who answers! =)

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