I would consider this a teaching opportunity. Get her a Faraday case for the device. Explain to her that the case isn't to protect the device, but to protect her from the device. Try to make her control the device, rather than the other way around.
Being the "confused grandparent" might be a fantastic way to teach via the Socratic method. Moreso if one is savvy enough to know what's likely being done (such as remote-admin by the school board), what is rather dystopian and ought to be avoided (see above), and how to work around the blocks put in place by others.
Ham radio tech license is a great way to apply some of the "irrelevant" parts of science like the speed of light, frequencies, layers of the atmosphere, and can even lead to fun things like talking to astronauts on the ISS.