You know what really grinds my gears? When teachers say, "Today, we're going over chapter 12 regarding the Mongols taking over China." Then he just sits at his desk and plays a John Green video on the SmartBoard. Then, he gives us a project pertaining to the material we were "taught" due two days later. Then I realize how repetitive it is, and eventually starts to spring my sprockets.
Hey, you know what else grinds my gears? When teachers get paid a bunch of money for sitting at their desk watching slam dunk compilations.