Charter school teachers resign

The New York Post is reporting that the remaining teachers of a Bronx Charter School have walked out of the school. They tendered their resignations at the International Leadership Charter School and so have 4 others during the year.
They cite that the Principal as abusive and a tormentor. So now this school has a staff of zero to teach the children. The teachers wanted to stay until the end of the year but they were escorted off the property. That sounds good to me teachers speak out, get removed and the school still stays open. Does anyone else see a problem here?
Our Mayor would like to see more charter schools. This is a big problem since teachers at these schools have no union to protect them. No one to go to file a grievence if they are being treated unfairly. So the teachers are harassed and the students ultimately end up paying the price. While the parents are clamouring to help their children and are applying in droves for what they think is a better solution of their children, it is not. Not when a Principal can get away with harassing teachers knowing they have no place to turn. It makes it a hostile working enviroment and who ends up paying in the end? The same that always end up paying the children.

as of yesterday :
still no survery in the mail for the high school