I'm always on the lookout for good resources that help learners to understand core concepts and tools, and I came across two videos recently that are short, but which have excellent visuals that can help anyone to understand how Google works.
The video on how search works explains the core concepts on how Google search functions.
Another video introduces Google Webmaster Tools, a free tool any website owner could and should use as part of a "toolkit" for search engine optimization.
See: http://www.casamarketing.org/course---content-and-seo
