There were times I got detention from her and I didn't even know what I had done wrong. She would just grab me and give it. And I would ask over and over why I had detention, and would never get a clear answer.
Actually physical abuse was common for the boys when I was in school. And now the coaches let the kids do it. My HS was in the news in 2003 for the sex abuse that happened under the coaches nose. Think football camp. In my community people who knew how these coaches were, say they know that the coaches knew what was going on.