This site is the first place I go for training materials on the most recent versions of Google Apps for Education. Click the link above to find short videos, slideshows, and oodles of links to templates and interactive websites for education. On this site, there is a link to a secondary site created by Erica Hartman for Google Docs.
Google Sites vs. WordPress for Web Design (PowerPoint)
There is no reason not to purchase this book in hard copy or in its much cheaper eReader version.
Short, informative chapters filled with images walk educators step-by-step through each App. This link excerpts the brief Google Account Set Up Chapter.