I like this BUT I would change it slightly to make a better acronym. "BEST" (beginning, evidence/events, solution/summary, title--> which prompts the writer to review their writing ti see if the main idea is evident) W.O.
This could be used for a mini lesson on Writing: Beginning Middle End. It will help the students understand what needs to happen in each section of their story. This can also be an organizer for them to use while they begin to write their story.