If they're denied collective bargaining, they have to get those salary increases somehow.

According to the redditor who posted this image, one teacher left this on the classroom's projector screen the afternoon before an open house. It's an ingenious way to make a little extra money off of parent-teacher conferences, while also teaching kids an important lesson in palm-greasing. Sadly, in most classrooms, a teacher would say all these things voluntarily, or else a helicopter parent might sue the school and demand the teacher be fired for not seeing their children's inherent brilliance and inner beauty. Still, good effort.

Sources: Redditor LePotaters