Supporting teachers using technology is never easy. They want to be trained as quickly as possible and usually don't have time to attend training classes. A few years ago I created videos to help with training at my district. I was doing some course work while getting a Master's degree. I used an open-source (meaning FREE) program called CamStudio (http://camstudio.org/) to capture my screens.
I captured an Excel lesson using the program and a cheap microphone. It took about 20 minutes and I didn't edit the video at all, I simply created it and uploaded it to Youtube.
It has been five years since I uploaded that video... hard to believe. But that video has over 35,000 hits. How's that for training!
Here is the link.
