This was very quickly thought up because I had a very similar problem at the time and a lot of times in the past too. I sketched it very quickly in the corner of my book, I thought it was good quick idea and just went with it. As you can see it was originally supposed to feature people in it, but I got kind of bored of them as I was making the storyboard, so instead I made it about ponies, an oc (original character) pony to be exact. I've drawn the star of the short so many times that I didn't really need to plan any drawings of her. I did, however design the teacher specially for this. I quickly designed him as a nice looking guy that goes completely insane when angry. I thought of this as I was making the storyboard too.
This is the main storyboard I used for the animation. It didn't turn out that differently in the end though, it's shot fairly similarly too. When I designed the teacher in the storyboard, I had thought about it quickly. This was the type of thing I thought of:
As you can see, the angry face is very much inspired by The Ren & Stimpy Show, with the exaggerated emotions in a similar style to that. Finally, as I was animating it, I made my own little animatic to get the timing right, and in the end I found myself spending countless hours doing the animation itself. I also spent a lot of time trying to apply what I had learned from the principles of animation and the story-telling task.I also applied some knowledge of cinematography, that I had learned from that task, plus my pixilation work. This is how it turned out in the end.