He was an impostor, cuz fake noodle is impasta and impasta is similar to impostor.

A plant.

The Math teacher, because numbers are the same in French as they are in English.

He said: I finished it. You see, there is a goat. Goats eat grass so the goat in my picture ate the grass. Now the grass is gone. But since there is no more grass left, the goat went somewhere else to find more grass to eat. That’s why the homework is blank.

A chicken that plucks itself.