Beginner's Guide

https://support.google.com/sites/bin/answer.py?hl=en&answer=153098

Can't beat the resources on Eric Curts' site:

http://www.appsusergroup.org/system/app/pages/search?scope=search-site&q=sites

Google Apps Learning Center

http://learn.googleapps.com/sites

Embedding a Google Calendar into a Google Site:

http://support.google.com/sites/bin/answer.py?hl=en&answer=157219

Patrick Crispen's pdf Google Sites 'How-to':

//http://netsquirrel.com/powerpoint/handouts/**GoogleSites**.pdf//

It is highly recommended that you check out the Radford Education videos on YouTube

that you can find by doing a search for Google Sites education. They are the best!