I have recently found two diffent messages about the power of story. The first is a blog article from Dan Blank, founder of WeGrowMedia. He is also a teacher with Writer's Digest. His article talks about the power of story in terms of writing to get your message out there or to make an action happen.
The second is a video from the author of Tell to Win, a book on marketing and sales.
Both the video and the blog have some of the same themes running through them--the power of stories. If your students need a boost in their writing, have them look around for a story idea. Stories are everywhere.