Not a good idea.

Bad teachers will find places not covered by camera if needed. Or, there will be a malfunction, even if the cameras are in all 4 corners of the room.

What follows: once they get schools past the cameras, they'll use that to overcome objections and cameras will be everywhere in everyone's life, except maybe the toilet and I'm not certain they won't do that sooner or later too.

It also works both ways. A based teacher with woke parents will get the shaft.

Accountability needed, but consider other options first.