School IT person should have an admin account and students should have a local account. Admin account should NOT have “613” for the password.
Administrator should be able to disable wifi. See link 1. I think bluetooth access may depend on a computer model and is often switched on using an external button. See link 2 that describes how to switch it on. Use in reverse.
If you have already disabled Wifi, you might not be able to see the links or even read this, of course…
links removed, sorry