I spent 3 days this week as a high school art teacher.
The teacher's absence was very sudden and unexpected. I was left with instructions that pretty much consisted of, "keep working on existing projects. If someone finishes, have them start a new project of their choice. If all else fails, have them work on homework."
I managed to keep kids working on artsy stuff for the first two days, but by day three nearly all kids were exclusively working on homework.
Friday morning was especially bad. We had a pretty good sized snow storm, but because of the number of snow days already used this year, school was not cancelled. I left home about 15 minutes early, expecting to be slowed down a bit. Twenty minutes out, I knew I wasn't going to make it on time, so I called the school to let them know. When I finally arrived, 15 minutes after school started, they were happy that I manged to show up at all. Several subs had been scheduled that day, and all but one other had cancelled outright.
One student, right before lunch, decided he was going to channel Jackson Pollock. Despite setting up several safety measures to prevent making a mess, he managed to get a few small red drops of paint on the bright white jerseys of several varsity basketball players. Needless to say, the athletes were a little upset. They held themselves in check very well, and the situation did not escalate, but for a few moments I thought there might be real trouble.