Google Earth can be used across the curriculum. I put together this quick-start guide to introduce teachers to the basics of using Google Earth across the curriculum. This is part of a much larger document that I am developing.
"In all there are 33 pages containing 21 ideas and how to instructions for creating Google Maps placemarks, directions creating and publishing a quiz with Google Docs forms, directions for embedding books into your blog, and visual aids for accessing other Google tools."
RefSeek's guide to the 25 best online resources for finding free educational videos. With the exception of BrainPOP and Cosmeo, all listed sites offer their extensive video libraries for free and without registration.