I am disgusted by constant bullying, degrading. female teachers - male students

I have 1 particular female teacher on mind, this one is the worst. There is more of them.

One of them is our female English teacher, she is constantly making fun of 2 male students. For example: She dictates us some sentences for revise and they are almost always about him being the dumber twin and that he's good for nothing (exept they are the same, but the other twin is female). I am absolutely sick of it.

Second student is clearly depressed, she's doing the same exact thing to him.

She also always talks about how boys are dumber and foolish and how girls are the best.

It's like this since i can remember. It is occuring in every time we have class with her.

These are the two students she makes the fun most of the time, but there are also another ONLY male victims.