Actually, we all have a kind of inspiration & imagination, but only few turn them into creative project. I am demonstrating only a 5 steps that would make you a very short stories writer, just believe in yourself, trust your imagination and start essaying them.
Step 1: Choose a Subject From Your Imagination & Inspiration, and Evolve a Topic Around It.
Ex: Think of a topic from your own experience ( comic, dramatic or romantic...) and try to extent it to be an event.
Step 2: Write Down Your Short Story Elements (events, Character, Time and Space..)
Ex: extent this original event and enlarge it to be as long as you can, and ask yourself Who does? When? Where? Why?
Step 3: Develop Your Topic to Events.
Each of your characters will do an event, in a time and in a space, develop them all and extract them as detailed events in a cohesion with the original event.
Step 4: Develop Secondary Events.
Ex: try to detail your secondary events, and enlarge them so they can be a kind of stories among the original story.
Step 5: Choose a Good End for Your Story Which Brings: Why You Wrote This Story.
Ex: give your reader an end event which will make him/ her why this short story was written for/ about.
Imagine your classmates as characters, each one has a story, bring the stories together, use the 5 steps above, use your imagination.. write your own story with your own style & view!