I agree the technology at Public Schools may not match a private...

I agree the technology at Public Schools may not match a private school. However government schools still use ipads/laptops in their teaching. Public schools even more would encourage BYOD, they can implement FZO still though as it will still provide a filtering solution while the child is at school on their BYOD device.

The cost may be worn by parents, instead of the school like a private may do, but I guess what price can a parent put on keeping their child safe and focused when at school. Let's say it is $7 a month to just protect the device while at school so the public schools can have more control I am sure parents would take that up..