There a many differnent tools available to do screen recordings. Here are two that I recently used.
Screenr is a free and easy to use Web 2.0 tool. I used it to create short instructional screen recordings for my class that I embedded on my class website. Here are some examples stored in my account online.
Another easy to use tool for screen shots and screen recordings is Jing. The software is free to download and to install on your computer. It lets you create screen shots in png format and record videos in swf format. Picture or video files can be saved on your computer or stored and shared in the cloud on Screencast.com.
Do you have any suggestions for creating screen casts?