I'm in similar situation here. It's tough! Great Courses, Khan Academy, studying for future AP tests are what my son is doing too. Can you grade skip him without early high school graduation? I have my son registered for homeschool as an "ungraded 9 - 12 grade" student. He's going to be in grades 9 - 12 for a long time, I expect! LOL!

Are there continuing education courses for adults he could take? Can he take a *single* class at the community college? I'm thankful the community college here is much more flexible. I started with their placement testing, and can enroll my son in single courses with instructors who are okay with it. I haven't done it yet, but I expect in the next 1 - 2 years because a math tutor would cost more than taking math class at the community college!!

Good luck! I feel for you!