Everything you ever wanted to know about screencasting but were afraid to ask.
This is a pretty extensive resource on the wwwtools for education website all about screencasting.
According to Wikipedia, a Screencast is a digital recording of computer screen output, often containing audio narration - essentially the sort of thing you would use software such as Camtasia for and is quite handy in showing learners the steps involved in doing something particular on the computer.
Well worth a look.
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