My answer is obvious, but I'll leave it here to start with.
We need to reduce the representation of women in education massively. The majority of women seeking these roles have malicious intent, and are actively harming young boys.
We know they don't mark boys fairly, but that's just the peak of the insidious feminist plot.
They've clearly been destroying the self-worth of boys in the schools to groom a new generation of woman worshipping simps.
If it were a college, you'd have a point. But it's not college, where a lecture is given and students are expected to to do everything on their won. If a child is failing or doesn't understand the subject material, a teacher has a responsibility to get involved and help them out.
If they don't have a case against the teacher, no disciplinary action against the teacher would be taken. If they do have a case, then disciplinary action against the teacher is warranted.
It's not like children don't talk to their parents about what goes on in the classroom, whether they're telling the truth or not. Many kids have smart phones in class and also record what goes on, but only for stuff that they care about.
Also, it's not like teachers don't deal with bad parents as it is.
Worst case scenarios: cameras wouldn't change anything.
Best case scenario: cameras would tell us who's lying and who's telling the truth.
It's the same thing with cops wearing body cams and that's been one of the best things that's ever happened with law enforcement, for both the public and the police officers.