Students look for signals and explicit signs to help them navigate the classroom. The teacher face is a great way to signal to the class that things have gotten off track.
Transcript:
Probably my favorite way to deal with those really annoying classroom distractions, particularly interruptions, is to just stop talking in the middle of a sentence. Cause the whole class knows that if you just stop talking something is wrong and they all start looking around wondering who it's directed at. But it’s not mean in a sense that I'm calling someone out, but it’s letting them know that their behavior is not acceptable. In addition, the ever popular teacher stare really freaks kids out.
