Here’s an interesting way to communicate concepts to students even after they’ve left your classroom.
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.
Teachers with interactive tablets or SMART Boards will find this technology most accessible, but a successful sketch can be created with only a mouse. For the example below, I used my touchpad to demonstrate simple division.
[kml_flashembed movie="http://sketchcast.com/swf/player.swf?id=XNticq7" width="425" height="350" wmode="transparent" /]