Storytelling is an effective way to convey information because it contextualizes problems which are, by definition, are decontextualized in the classroom (most of the time, anyway). The use of storytelling in adult education is centuries old, beginning with families, tribes, and communities, and leading today to some of the most progressive classrooms.
I am researching this topic because it is a top contender for my final project. Here is a paper on storytelling, its cultural roots, and its relevance in contemporary adult education. Don't read all 276 pages (well, you can, but I'm sure life has more to offer) but be sure to check out pages 10-18 for a brief look at the relevance of storytelling as we know it. Enjoy!