Today I walked into an assignment that should have been hell. The school I worked in today just got back from spring break on Monday. The teacher I covered for has been gone all week, and they've had a different sub every day. It isn't common knowledge, but there comes a point, after enough different subs in a row, that the students turn feral. Any conditioning or routines put into place degrade very quickly; often within two or three days. Before the students arrived, in fact, I had other staff warning me that I was in for a rough time.
Actually, when I first got to the room there was a teacher in there getting some stuff around. The first words out of her mouth were, "Oh, good. You're tall. Do you have a loud voice?"
I think part of what saved my day was that there were high school students giving anti-drug presentations during every class period. Any time remaining I only had to facilitate silent reading.
The day actually ended up being pretty easy. Even ended up getting compliments from both staff and.....students.