It’s school equipment, not personal equipment, as should be the Google Account associated with it. The value of these is to the school, not to you, not to your children. Treat it like a work laptop and segregate personal crap from school crap (or enforce this on your kids) and return it at the end of the year if you don’t want it.

Or just send your kids to a different school, but frankly I’m not familiar with your school system or how much choice you guys have on where to send your kids.