We did this last year, with ALEKS. DS8 in 3rd grade last year just worked on his ALEKS on the computer during math class, in lieu of the other math. Our school is very good with this sort of thing. This year, going into 4th, he will be taking a middle school math class instead. By next year, I expect that he will be done with middle school math and we will be doing an online high school math class instead -- they are just starting the online high school this year for our area, with a state-accredited curriculum.