Answer:
It comes only before, it comes only after. Rises only in darkness, but rises only in light. It is always the same, but is yet always different.
Proof you've done your time in school
You use it between your head and your toes, the more it works the thinner it grows. What is it?
Sheets of paper that tell new stories each day.
A squiggly line tells you when you've done it wrong
Walk on the living, they don't even mumble. Walk on the dead, they mutter and grumble.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?