Yeah, when i was in school; there were no devices issued to students. We had ‘computer labs’. Ie; a room full of computers for student use. There was always one computer for the teachers to use that had a remote-desktop interface monitoring every screen in the room live. They could always see what you were doing, lockout your keyboard/mouse, blank your display.
This really doesn’t seem any different.
I could understand outrage if students were require to install this on their own hardware; but school issued devices are under the schools monitoring and control. Always have been.