I started a new World Religion class today, but it is much more short term--just a brief introduction to the major World Religions. And I used the following videos, which I think is such a wonderful resource for these types of classes:
This is a 90 second video that traces the birth and growth of five major world religions-Buddhism, Christianity, Hinduism, Islam, and Judaism. It shows how each religion has evolved over time, using the timeline at the bottom, and over space, since it shows each one how it came to dominant various countries across the world, as depicted on the map.
I have some quibbles with it, especially since it doesn't deal with paganistic faiths that have played and continue to play a major religious role in some countries, particularly in parts of Africa and China. But I can't imagine a better way to show the timing and the territories of the major religions.