Googol to 1

Free Online Documentaries

Tech-news site, MakeUseOf, has posted a great list of free online documentaries. Several of them would be great discussion starters in Science, Social Studies, or Health.
http://www.makeuseof.com/tag/10-awesome-free-documentaries-watch-online/

While you're at the site, make sure you check out their other offerings. Of particular interest is a great selection of how-to guides and cheat sheets for lots of different tech topics.

Get Going With Gliffy

http://www.gliffy.com/ - Is a cool online diagramming software.
Gliffy can be used as... Flowchart software
Network diagram software
Floor plan software
Org chart software
SWOT analysis
Wireframe software
UML software
Business Process Modeling
Web Site Map Software
Venn Diagram Template Software
...and more!