Learn it in 5

This site has lots of  short instructional videos for teachers. As they say on their home page:
"Learn it in 5 is a powerful library of how-to videos, produced by technology teachers, for the purpose of helping teachers and students create classroom strategies for today's 21st century's digital classroom. These step-by-step how-to videos walk teachers through Web 2.0 technology, demonstrating how to use Web 2.0 applications like blogs, social networks, podcasts, interactive videos, wikis, slide sharing and much more."