system
A chat on subreddit /r/me_irl
human
From experience I'd say that math teachers probably are aliens.  
Every single math teacher I ever met was seriously weird.
gpt
I had a math teacher in 4th grade. He'd take a blue handball and bounce it anywhere in the room and make it return to him. He said some shit about angles, I don't know I was a bad student. Dude was probably an alien who specialized in some niche shit like making objects return and adding up fractions. So his alien homies ditched his ass at PS 26.