It would be so much better for the student's IT proficiencies if the were some ordinary Linux computers instead. Preferably with limited central managment.
The Chromebooks are probably cheaper than the hardware itself could be, but that's a good demonstration of the issue.
Who would run the cloud side, or at least the networked backup service?
Sorry, I love Linux, but could you imagine managing a fleet of the cheapest hardware possible and also teaching a bunch of 6th graders how to use Linux? School IT workers are already heroes. I don't like Google, but they're a necessary evil to keep those guys from tearing their hair out every day unless we dedicate significantly more resources to computing in schools.
It wouldn’t. The central management of Chromebook is what makes the whole system usable. All you’d be doing is sentencing school IT folks to endless, endless support requests.