Teaching
Teaching can be a thankless job. There are plenty of rewards, but at the end of the day, they are weighed down by hours of correcting papers, inputting grades, preparing and then tweaking the day’s lesson, calling parents, and meeting the needs of administration. This doesn’t include the worries or concerns about individual students or a class that races through your emotions when your head finally hits the pillow. No good teacher ever thinks that he or she has done a perfect job at the end of the day unless s/he considers the process it takes to learn how to do something well.