This doesn't really make sense. He'd be covering 3 years material (6th, pre-alg, Alg I) in 2 years by skipping the first two (6th, pre-alg), and then doing the third (Alg I) stretched out over two years.

Instead it would make more sense to compact 6th and pre-alg into the first year and the Alg I in the second (single) year. This would get to the same end point in the same time.

On the other hand, if he can handle the jump to Alg I, then why not do it in one year?