I think I can see the wrinting on the wall. Eventually the internet is going to replace teachers and classrooms. After all, the internet can't go on strike, no massive expensive buildings to maintain, and no lunches to pack.
So it seems that teachers are an endangered species.
What I propose is a Teacherasium -- teachers in display cases standing at blackboards pointing at something written on it. Teachers sitting at their desks marking papers while students throw spitballs at them. Teachers in the staff room playing poker.
Of course there will be a teacher's breeding program, and I can tell you, it won't be hard to make that happen!