Cee,
We got our daughter a pre-algebra book dirt cheap on Amazon (used textbook - it was only a few dollars plus shipping). She thumbed through last summer and said there wasn't much in there she didn't already know.
Our state does algebra readiness testing and the beginning and end of the year to ensure progress. Does yours? She rocked that test and we used the score to advocate for acceleration in math from 7th grade math into Algebra I. We were initially worried about gaps since she was missing the 2nd half of 7th grade and all of 8th grade math this way. She hasn't missed a beat. She is doing very well in Algebra and her Algebra teacher told me last week that moving her up was absolutely the right decision. She's 12 and with high schoolers for math only. She hasn't had any issues from being in with older kids.
I doubt that your son would miss much by skipping ahead. If it's only one class, I think he will be OK. Girls that age are giggly. He'll probably think they're weird
What is the structure of his school? Is it K-6 or is there a middle that he's already in?
Is there a project he could work on for the last quarter during math period? Maybe he could use it as an independent study time. Who knows? Maybe he could come up with a nifty money saving idea like that middle schooler who discovered Garamond saves millions of dollars in ink
