It's a ruler.
It's a book.
It's a pencil case.
It's a bag.
It's a pencil sharpener.
It's a rubber.
It's a window.
It's a pen.
It's a poster.
It's a pencil.
It's a desk.
It's a board.
It's a bin.
It's a door.
It's a cupboard.
It's a chair.