Thanks so much. I will check out Aops and Aleks - both sound interesting. Someone else also recommended Dragonbox to my husband, so it's nice to see it mentioned here as well.

My dearly beloved despises Khan Academy - doesn't like the way the concepts are taught at all.

And since math and I parted ways for anything beyond making change and making projections and budgets for my business, I'm really not a good judge of the quality of a program.

Since my husband has many of the same LD's and a minor in math (he's an EE), I think we're going to ask for the school's 7th grade gifted curriculum to do over the summer so when he starts 8th grade next year, we know he is caught up. But I also want to look at the online/app options to supplement.

Thanks again - this forum is an amazing wealth of support and information.