19. Teacher
This shouldn’t even be the slightest bit of a surprise. It could even be more surprising as to why it ranks this low on the list. Being a teacher is both stressful and challenging, no matter the age of your young students. Imagine being responsible for the educational development and welfare of at least a hundred students in a school year, not to mention the sleepless nights of doing lesson plans, computing grades, and packing a long string of patience every day.
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