DS has used CLE with good success for the last several years. Knowing we'd have to switch at some point, we tried both Math Mammoth and Beast Academy this year and both attempts failed miserably. DS definitely needs a spiral program. He's usually quite good at math but needs frequent review to keep things fresh.
My plan was to do CLE 7 & 8 next year, accelerating as has been described elsewhere on this board, but now I'm not so sure that will work. We sort of tried that strategy this last Light Unit, trying to get through more of the 6th grade level since we got started late (thanks to the MM/BA debacles.) He bombed the 606 test.
Are there other one-year spiral prealgebra options? I'd like him to get to algebra in 8th grade since he's interested in STEM careers and I'd like to keep his options open.