She started her career as a kind hearted, caring person. She loved the kids she worked with, especially the kids on the lowest levels. She never saw race, religion or nationality, only a child in need of help.
Unfortunately, along with her soft heart came discipline problems. Her very rigid supervisor did not approve and he started showing up in her classroom many times during the week. Each visit was followed by a session in the supervisor's office where he would yell and belittle her and then threaten her with U ratings and the loss of her job.
She was scared. She had young children and needed the job. She reinvented herself in the image of her supervisor in an attempt to win his approval and stop the continual harassment. Things slowly began to get better for her. Her classes got quiet and the supervisor was happy. Unfortunately, the children in her class did not fair as well. The environment they once flourished in was gone. The loving teacher was replaced by a heartless Gestapo guard. There was no longer any love and caring in the air. The kids who were failing before still failed. The children who once blossomed under her care were now doomed.
(This is what happens when people with no ability and no heart get a little bit of power.)