Punny Pinkie: Substitute Teacher

>Sitting patiently in your seat, you await the teacher's arrival.
>It was already twenty minutes past the beginning of class.
>Where could she be?
>This class on pony history was something you looked forward to, but there was one factor that made it a miserable time.
>Pinkie, your desk neighbor, is busy babbling away about some party she threw for somepony.
>She does this... Every. Fucking. Time.
>You lost focus of the conversation ten minutes ago, but that doesn't stop her from continuing on.
>The doorknob begins to jiggle before reluctantly swinging open.
>Something was off; this wasn't your normal teacher.
>The light gray mare walks into the classroom and places her bag on the desk.
>She grabs a piece of chalk and begins writing her name on the board.
Derpy Hooves
>"Hello class. My name is Ms. Hooves and I will be subbing for your teacher today."
>Small murmurs begin to spread throughout the room, all pointing out one thing.
>She was cross-eyed.
>A few mares giggled at it as you throw them a glare.
>It was impolite to laugh at someone, regardless if they had a problem or not.
>"Now, please open your textbooks to page three hundr-"
>Her sentence is cut off as a spitball hits her forehead.
>One of the stallions begins to throw paper balls at a mare as the two mares in the back begin talking again.
>"Class, please! Settle down! We have a lesson to cover."
>The noise in the room increases to eleven as the deafening screams of students bounce throughout it.
>Ms. Hooves tries her best to try and calm the class, but receives no results.
>Tears fill her eyes as she runs out of the room.
>Shaking your head you turn to Pinkie who was now wear a grin so large, you were certain she was a cartoon character.
>Before you can even stop her, she says it.
>"I guess she couldn't control her pupils!"