Because they always work problems out with a pencil.
Nevermind, it's pointless.
Pennsylvania
A *paradox.*
Their work usually has them pretty bent out of shape.
Boy do we have problems.
It taint yours and it taint mine :D (Puns for the win :D)
He worked it out with a pencil.
In the end, both are lucky to produce a stool.
Works it out with a pencil.
Math teachers, because every student counts.