Fundamental Resources???

I am currently going back to school to get my master's and get certified to teach in hopes of becoming a coach. I have been gathering various materials to help me build my knowledge base and keep me motivated. While it is enjoyable to study schemes, systems and all the X's and O's, I know that all that is really secondary to what is important. I would like recomendations on some resources for the fundamentals. I mean the basic's of blocking, tackling, and ball handleing. The simple things such as the center QB exchange. I would also be intrested in fundamentals associated with option football.