I work with Special Education student who have disability-related behaviors, such as students with ASD, students with ADHD, and Emotional Disturbance, now called "Emotional Disability." I'm often asked by teachers "how do you spend your whole day working with these, the worst kids in the school?"
If I know them well, I tell them the truth: I can work with a person who acts out in because I'm not trying to teach twenty-four other kids Algebra II at the same time. Also, because I'm male, I was in the Army, so I don't have the kind of visceral fear a female must have when confronted by an angry person with the mind of a child and a body the size of a grown man.
Our solutions to these behaviors is research-based psychology. I have a masters in psychology, and I get paid to use these methods, so I do. But the rarely, if ever "work" in the sense of bringing about real change in a child with behavior problems. Changes that do come about are nearly always brought about by the passage of time and the maturing of the brain. I try to keep them as much out of trouble until then as possible.
Because of campus administrators' fear of parents complaining to district, and district's fear of parents complaining to the school board, and school board's fear of parents complaining to the media or to the State Board, teachers are handed such children and asked to make the best of it, while also being pressured to keep state test scores up.
In Texas, administrators are a little better than I hear many states are in protecting and backing up teachers, but it needs to be far better.
Two things need to be used to control behavior far more: Alternative settings, i.e. in-school suspention and DAEP, and out-of-school suspension. The second is most effective at getting parents' attention, though it often leads to the dreaded complaints. We need real changes to laws such as IDEA, but the only people who get input into such laws are advocates for the disabled. If they want to hear form teachers, they go to teacher union, who are unfortunately part of the problem.