Sketchcast.com is a site devoted to the creation and sharing of sketches, with or without audio. A great feature of this site is that each sketch you create is given an embed code, so you can attach it to your blog, wiki, or website. Share sample problems with students, record concept-mapping instructions, illustrate a lecture, and more.
A successful sketch can be created with only a mouse and a microphone. If you have a laptop, you’ve got both! For the example below, I used my touchpad to demonstrate simple division. For teachers with interactive tablets or white boards, the process is even easier.
[kml_flashembed movie="http://sketchcast.com/swf/player.swf?id=XNticq7" width="425" height="350" wmode="transparent" /]