It's a huge gap here - and the few schools that may make some adjustments to the learning are VERY expensive. So many parents from the school keep saying "I wish there was a high school option that would suit my child, where they can keep learning like at our school".
Maybe now is the time to go into business as a 'micro-school' for High school aged kids, so that by the time your children are ready you'll have a whole community for them all set up?
Best Wishes,
Grinity
wow I like this idea!!

I will need to find out if I can do it as a homeschool set-up or a business instead of an actual school though - to set up a private school here is insane with all the red tape etc. I am definitely going to look into it properly.
My current business is sort-of already halfway there I guess, and this would kind of be a natural extension
