I found a fill in the blank type of story for your Spanish I students to do. It is all about their school. You can have it be factual or make up something, which I think would be more fun. What I think would be even more fun would be to set it up in a type of Spanish mad libs game. In order to do this you'll need to number the blanks and specify what each blank should be ("nombre de una persona" for example)
I can't remember who's blog I was reading that had this. If it was you please leave a comment.