As I think I've mentioned before on this list, nothing running on non Google Chrome hardware can meaningfully be called Chrome OS. Verified boot and automatic autoupdates are two of the core features of Google Chrome OS --, both of which do not work on non-Chrome devices, as they require hardware support and special handling in the factory.
Anyone trying to tell you otherwise is leading you down the garden path. Please, feel free to play around with Chromium OS all that you want, and even feel free to deploy it in your schools if you so choose, but be aware of the things that you're not getting and make an informed decision.