Through the Google Public Policy Blog I just learned about a series of three videos created by YouTube for the purpose of educating students about online behavior. Each of the three videos are roughly two minutes in length. Each video provides clear narration and visual aids. The three videos are Detecting Lies and Staying True, Playing and Staying Safe Online, and Staying Safe on YouTube. These videos could be used in any classroom, but they really seem aimed toward a middle school audience.
Embedded below you will find Playing and Staying Safe Online.
Here are some related items that may be of interest to you:
Kido'z - A Kid-Safe Browser
Firefox Plug-in for Filtering Profanity
Phishing Detection Education