Today is World Teacher's Day, so let's recognize the crazy stuff that our education professionals have to deal with on a daily basis. 

On top of learning and imparting the knowledge of difficult subjects onto students who don't want to learn it, teachers have to deal with unruly and sometimes downright creepy behavior on a daily basis. In honor of that fact, here are over a dozen stories from teachers who shared the most disturbing thing they ever saw a student do.