such as summer vacations and such will be enemies of such a plan. In warmer climates you'll need AC and you'll still need to heat the schools somewhat to prevent damage to the interiors. Already schools seem to be running a little later into June and starting in August instead of September (as I remember as a kid. You mentioned there are fewer farmers but there still are quite a few farming communities out there who's school might need to be on a different schedule than those in the city. It wasn't that long ago we were reading about recommendations to have school all year round. I don't hear much about these days. Traditions aren't easily changed by force.
I just saw this article... Why the Bus May Not Make A Stop for Your Kid This School Year - High Oil Prices Force Cost-Cutting Nationwide. It made me wonder if there has been any discussion in people's communities about next fall's school year and the ever increasing costs of heating school buildings and moving kids to and from the school.
It strikes me that one thing US culture might want to rethink is the traditional summer break for kids. We did it for years, because as an agrarian society, we needed our kids to help out during the growing season. Since the majority (over 50%) of US population now live in urban or sub-urban settings, do we need our kids to have summers off? Would it not be more economical in today's world, to take two and a half to three months of school recess during the winter months ? Heating bills and gasoline costs could be reduced.
In order to cut schooling costs, do we need to reorganize the school year?