Lazy? Corrupt? Overpaid? You don't know what you're talking about. Teachers are among the hardest working people out there. They have to spend time researching and writing lessons, planning the logistics of how the lesson is presented, making sure they have their props, working on advanced degrees, xeroxing materials, calling parents, counseling or tutoring students, etc. Much more likely to be corrupt are the politicians dictating educational policy to school administrations from a standpoint of complete ignorance or even greed, if they can make some mega-bucks out of it from the Wall St. hedge fund "ed reformers". Also, said administrators, who force teachers to pass students they don't want to pass because they did not complete the requirements.
Yep! All of them win the Mother Teresa award.
When has a teacher had a gun held to his or her head forcing them to go to work and change grades? None?
They do it for money, generous vacation time, and a pension.