[giantg2]

"There simply aren't enough people, or enough space to do so."

The people part is the issue. The teachers I know hate the bureaucracy and policies. Private schools seem to be better at hiring, even when they pay less. Dealing with certain parents is a nightmare too.

If you have a classroom made for 25-30 students, it wouldn't be too hard to partition it in half, then have two instructors leading each half of the room.

I went to a robotics class and a game design class as a kid and they both had something like 20 students with two instructors. It went fine. Sure some of it was introductory instruction, but then we'd build our own stuff as individuals or teams. So there might not need to be much reconfiguration at all.