I was substitute teaching a couple of days ago for a "high needs" (which seemed more like "troubled kids who don't like school" from my experience, though I can't say for certain they had any learning disabilities or anything at all besides) class of about eight kids. Not knowing it was high-needs, I feel I handled the situation(s) pretty well, and most of the material (all but one thing, really) was covered and completed. During the final hour of the day, I was an aide in another teacher's math classroom, and it was one of the worst experiences I have ever had as a substitute teacher thus far. This teacher (an older woman, though I am uncertain as to how long she'd really been teaching, or teaching there) was borderline verbally-abusive to her students. She seldom addressed students individually (unless they were somehow "unruly", in which case she embarrassed them in front of everyone else by shouting at them for misbehaviour in the middle of a lesson), and seemed to be blaming the entire class for one or two kids who were slow to take out their notebooks and writing utencils, or who talked (at all) during her lesson. This caused her to both take a very long time to get through the lesson, and to lose nearly all of her students' interest. If one student said "I don't get it", she would sigh and shout directions back at the whole class, often including snippy remarks such as "just like I told you before", "the way you should have been doing it the whole time", and "why weren't you listening when I was talking?" Meanwhile, I helped students individually, and they seemed very receptive to me. I get that teachers have bad days. Off days. My off days, I'm usually a lot quieter and a bit less patient, for example. But I found this to be inexcusable, especially after hearing remarks like "I was having a pretty good day until you all started acting up". I could probably write a page with all of the nasty things she said to the class and how I felt she handled things poorly, but I won't. I think you can all get it. When I left for the day, it crossed my mind to say something at the office about what I had seen, but I didn't, for fear that I might not be called back to that school (where I have previously subbed and been requested back by students). I do feel like speaking up might be stepping on somebody's toes, but I feel like nobody will hold the teacher accountable if nothing is said. What should I do? Anything?