After reading all the comments, I'm just gonna say that if you don't allow kids to tinker and do their thing, they will learn a lot slower and your "investment" will be left mostly unused. (age range proper hardware/OS of course.) The school policy is not doing the kids a favor, it's a waste of time and tax money that you cultivate a generation of people get used to chrome book and google apps. That's the ultimate purpose for school license being cheaper.
We've got young adults entering the workforce that cannot comprehend what a filesystem and directory structure is due to 10+ years of these sandboxed, guard-railed tech products.
I now understand that existential crisis that people become too dumb or not capable of operating technologies developed by previous generation.(like the Walle movie.)