For those who are interested in learning the elementary aspects of General Relativity here is an excellent tutorial.
As the author states it is not designed to be mathematically rigorous, thereby making it possible to understand what is otherwise a very complicated subject to most people.
In essence it is an explanation from a physicist's perspective rather than a mathematician's.
http://www.youtube.com/watch?v=foRPKAKZWx8
Regards
Steven