[shelterguy]

Those who can, do
Those who can’t, teach
Those who can’t teach, teach gym
Those who can’t teach gym, become administrators.

[Ancesthntr]

“Those who can, do
Those who can’t, teach
Those who can’t teach, teach gym
Those who can’t teach gym, become administrators.”

---

... and those who show what a bunch of idiots the administrators are, go to jail.

[Romulus]

And those who can’t teach administrators teach teachers.