"If you don't have a YouTube channel as an education provider, there's a good chance you're behind the times. Nearly every major educational institution in the world now hosts its own collection of videos featuring news, lectures, tutorials, and open courseware. Just as many individuals have their own channel, curating their expertise in a series of broadcasted lessons."

informED has links to other good resources from this page also.

" While digging into the resources I have posted in Twitter for Teachers section here in Educational Technology and Mobile Learning I picked out for you these awesome posters. These are some of the most popular graphics available online and which are also good guides for teachers and students seeking to learn more about Twitter. I am inviting you to have a look and let us know what you think of them. Enjoy"