1) Has it really? I'm sure the potential exists for video lectures or whatever, but I think the teachers still ostensibly at least teach.
2) How little do you pay babysitters? At, say, $5 per kid per hour, a teacher of 20 would be doing pretty well, and that's on the low side of class sizes these days I think.
2) How little do you pay babysitters? At, say, $5 per kid per hour, a teacher of 20 would be doing pretty well, and that's on the low side of class sizes these days I think.