I started on the site by doing lots of screen shots of how to do things and creating step by steps.
Now I am getting more into creating screencasts using Quicktime. There is an extremely handy dandy "new screen recording" option there.
If you don't have the Quicktime version that does this, there is an online programme called Screenr. This is useful, as you can also download the screen cast that you make so you have more control over hosting it.
Recently, after the 2 week break, I have had various staff members wanting refreshers on adding site pages onto the horizontal navigation bar and onto the drop down menus, so I decided to make screen casts to cover these two things. The first one took 3 tries as I hadn't made one for a while and kept starting to talk too early, and stumbling over my words. I got there in the end, but it is weird sitting in an empty quiet classroom, talking to a computer screen!!
Here they are....
Adding a Horizontal Tab
Adding a Drop Down