and the teacher will ask us somthing like thes- what do you need to have in a story? like plot' etc..
there are three things.
could you tell me what are they? thenx
and how do you write an essay??
See here for advice on essay writing: How To Write an Essay
and here: The Five Paragraph Essay Wizard- Essay and prompts
As to writing a story - what seriously do you like in a story? See if you can list what you think makes a good story.