Best schools for what your kid wants would be MIT, Carnegie Mellon, Stanford. These are high tier schools so keep him with the AP Maths and definitely AP sciences - make sure they're always a step up in difficulty. Try summer programs like MITES, Carnegie has one too. Make sure they have extracurriculars. The more diversity the better. These aren't the only routes to go but they're the best at what you kid wants to do.
Those all sound like seriously expensive. T_T Do they offer scholarships for kids with special needs? I assume that’s his best bet aside from his grades. Seriously, any info is appreciated. I never got beyond a GED so this is all new to me and I feel like a shit parent for not knowing how to put my kid on the right path since mine fell too short. I’ll keep tagging these as #unrelated for those that want to ignore these. Sending responses to my personal blog would be best too. -Abby