Phil Bagge has created a really great set of videos looking at things Google including Gmail, Google Docs, Google Calendar and Google Forms. He also shows off some classroom based examples of work done with the apps.
At the top of the page are also links to other series of videos Phil has made including some around Office applications.
"When we perceive of risk in sharing publicly and interacting online we nearly always risk obscuring huge benefits with our own inflated fear of the unknown. Research shows that digital risks are far outweighed, in fact, by challenges more close to home and school."
From Ewan McIntosh comes this review of current research into issues of cyberbullying and connectivity