The exact presentation Sam used isn't available as it was mainly pictorial. However the video she showed is available below, as is a similar presentation. Further information from Sam, including Privacy & Security FAQs, is at the bottom of the page.
Google Docs in Plain English:
Why Google Apps for Education?
Terms of Service for Google Apps Education Edition.
Google Apps Security and Privacy FAQ - this highlights responses to many of the questions we commonly field when talking about Google Apps. It also includes further links to our detailed Privacy policy and Security White Paper.
Google Privacy Center has a wealth of information about privacy at Google including the privacy policies for the individual Google Apps such as Google Docs and a recent video about Privacy and GMail.