Fights over the water fountain
There used to be fights over the water fountain when I was in high school. The situation was the schools fault because the water fountains were unsupervised.
I got around the problem by drinking two glasses of water before I went to school.
As often as not there was p*** colored rust in the fountain water anyway. After phys ed there should have been supervised drinking at the available water fountains and the teachers should have made sure everyone got their turn at the fountain.
I believe that choosing teaching as a career means you are too stupid to do anything else.