
Screencasting is one of those things that have gotten so easy and inexpensive. I remember when Camtasia was really the only screencasting tool. And it cost a bundle and often times it didn't work. Now we have Screencast-o-matic along with others that make it an easily used tool that is cost effective. It's so easy you can almost just figure it out for yourself how to use it. And it's cost effective because its FREE!
[*Note - one problem I did experience was when I copied and pasted the "tiny" size embedded code into the html it wouldn't play. I had to change the code from np=1 to np=0.]
I can immediately see a use for this as a teacher. For example doing chemistry, physics or math problems for students that were absent, didn't get understand it the first time or just need a refresher. This then can be posted to the teachers website or they can be saved as an MP4, flash, or posted on YouTube whatever. They can even be put on the last "Thing" we did - "VoiceThread" so students can comment on it and ask questions.