What’s in a school locker???

What’s in a school locker?
In a school locker, there is that crumbled-up paper that was due weeks ago,
but forgotten about
In a school locker, there is the chip bag that you got from lunch,
that you are just waiting to eat in a class that allows snacks.
In a school locker, there is a lousy decoration you put in your locker,
But forgot about that nearly fell off.
In a school locker, there is your backpack that barely fits.
What is in your school locker????