Like one room schools?
Hey - mine had two rooms;) LOL!!!!
The ideal solution would be much like the original church-affiliated schools. Everyone pitched in - usually with at least one professional teacher. Home-schoolers could accomplish the same thing if there were enough children and funding in a limited area to support a facility. Sadly, there would be too many Federal, STate & local regulations.
Both my kids attended a one-room school k-5. It was the best experience for both of them and for us as parents. Being so small, all the parents helped out, knew all the kids, knew each other, knew the teachers, knew what was going on every day. It was the longest continually operating school in California, opened in the 1850's. Sadly, the school district shut it down at the end of last year after threatening to do it for years.