Yea I graduated from Chicago Public Schools and they gave out chromebooks starting in 8th grade. I think that was the first generation of them so maybe CPS get some deal, but through high school the chromebook system only seemed to expand. I imagine it's possible for OP to get one from school.

I think it's now a managed device and that won't help.

If he power washes it, I believe it's still locked down to the school, I could be wrong thought.

There's a separate provisioning process for the "very locked" state you're talking about, not just signing in on the device.

Ah neat, thanks!

Factory reset and not logging into the account again, should fix the issue.