Thanks for recapping your experiences Austin.
... I could do 8 digit division in my head...
This is impressive.  What do you do now?
4. Map out a roadmap for them in all subjects and adhere to it. Make sure the roadmap aims right through a college curriculum. This will give them discipline. My mentor noted above did this for me in Software and Astronomy and it made a huge difference.
This is what I would like to do for my DS: what are the resources and process steps for developing such suitable road maps?  Is this, in effect, the same as drafting an IEP?  Where do you look for appropriate age/learning benchmarks?