Here is a video that has a brief tutorial about theme. (Give it a second to load.)
Another video, in more depth: http://www.youtube.com/watch?v=p4qME64SkxM
More Online Resources, for teachers, regarding the Hero’s Journey:
http://www.mythologyteacher.com/The-Hero%27s-Journey.php
Online interactives & webquests, for students:
https://www.quia.com/rr/934941.html
http://www.readwritethink.org/files/resources/interactives/herosjourney/