Prior to this my class has been looking at different genres. Each week we focus on a different genre e.g. fantasy. We read passages from books brainstorm characters and settings for that genre and then the students have the chance to write in that genre.
We have focused on how the story is set or the plot.
Your assessment may be different depended what you have been focusing on with your students.
This will be done over multiple weeks. The students will draft their story in their creative writing books by hand before typing their final edited copy.