I have no answers, but I want to give you my support. I think there are quite a few of us who face the multi-acceleration issue. We started homeschooling exactly for this reason, but know it will be staring us in the face as we get closer to high school/graduation. For some of these children, it only gets worse, too, as their learning continues to outpace a school year.
It does sound like a lot of parents here are finding success with single acceleration and then multi-level subject skips. We're also starting to research the idea of asking for DS to join multi-grade-skipped classes a few periods each morning, then coming out for afternoon homeschooling.
Please keep us posted with your journey!
