Want to learn some basics about 21st Century Skills? Atomic Learning has an entire section of video content devoted to 21st Century Skills.
Check it out.

District 214 has a subscription to Atomic Learning that is accessible from computers inside the district network. This resource provides hundreds of training videos for Mac or PC topics including application-specific content. There is content on the latest operating systems including Leopard, Snow Leopard and Windows 7. For self-paced learning, please visit the Atomic Learning [...]

US-Cert has published a short list of guidelines for publishing informatin online. It is important to remember that anything posted online should be considered public. Read more…

US-CERT has published an article with tips to shop online safely. There are a number of special precautions that shoppers should take to avoid becoming a victim from various online attacks. Here’s an excerpt from the article produced by US-CERT:
How can you protect yourself?

Use and maintain anti-virus software, a firewall, and
anti-spyware software - Protect yourself [...]

In Mac OS X there are three modes you can choose from when using Calculator: Basic, Scientific and Programmer. It’s easy to switch between modes by pressing Command-1, Command-2 or Command-3.
Thanks to this Mac OS X Tips site for this handy tip.