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Video Conferencing, Streaming Video/Podcasts & Web Cams

Video Conferencing
CILC - Center for Interactive Learning and Collaboration.
Michigan State University Museum - virtual outreach
NASA - See what NASA has to offer in the way of interactive lessons on earth, the solar system, and outer space.
AT&T Knowledge Net - Links to video conferencing content providers from across the world.
Vanderbilt - Vanderbilt University Center for Science Outreach.

Streaming Video/Podcasts/Online Slideshows
Annenberg - From Annenberg and Learner.org.  Free streaming video content & Prof. Dev.  Free registration is required.  
United Streaming - From the Discovery Channel.  You can register for a 30 day free trial.
History Channel - Search History Channel archives for video and audio clips.  It's free although does contain ads.
Apple Learning - From Apple computers comes digital documentaries and virtual field trips.
CNN Pipeline - Requires a small monthly fee.  Great for research!  Watch current videos from the world's news leader.
National Geographic- Create maps, listen to podcasts, view video segments
PBS Nova - Podcasts, Videos and interactives
Electronic Field Trips (EFT) - From Ball State University.  Webcast only versions are free of charge.  Archived trips are also available for viewing here: http://www.bsu.edu/eft/home/31digest.php
Bytesize Science - podcasts only
Exploratorium - Ice Stories: webcasts from Antarctica
YouTube
SlideShare
 - view, post, and share presentations


Web Cams
Monterey Bay Aquarium, CA - 7 cams on penguins, otters and more with live audio during their daily feedings.
Smithsonian National Zoological Park, DC - 20 different web cams of various animals