Content filtering is mandatory in K12 schools and can be fairly expensive. Hardware in schools take a beating and need more frequent replacements. If you think network equipment is bulletproof do some work for a school. You can grill food on some of their routers. If it were my decision, there would be 10G network to all public schools and companies would be allowed to bid to be providers using bandwidth branching from those hops. It would push down costs, create an open business model, increase bandwidth to all areas of cities, and move schools closer to were they need to be technologically.