What comes to mind when you think about substitute teachers? For me, spitballs, goofing off, movies, and shenanigans top the list. Sure, these may be cliché, but there is truth to the fact that substitute teachers walk in to less than "controlled" environments all across the nation on a daily basis. It's not easy. And just when they're starting to build a foundation of respect and rapport, they get called in for another assignment.