user2693: Just wondering what software he uses. I see his videos regularly and I'm somewhat impressed by the video and audio quality of his screen-casts.

user4426: He uses Camtasia Pro ($200) a Wacom tablet and (at least on the earliest videos) MS Paint. And a head mic. 
http://www.teachthought.com/technology/how-to-screencast-like-the-khan-academy/
On a mac, a similar piece of screen capture software would be Screenflow, although Khan works on a Windows machine:
http://www.telestream.net/screenflow/

2693: <p>Just wondering what software he uses. I see his videos regularly and I'm somewhat impressed by the video and audio quality of his screen-casts.</p>
 4426: <p>He uses Camtasia Pro ($200) a Wacom tablet and (at least on the earliest videos) MS Paint. And a head mic. </p>

<p><a href="http://www.teachthought.com/technology/how-to-screencast-like-the-khan-academy/" rel="nofollow">http://www.teachthought.com/technology/how-to-screencast-like-the-khan-academy/</a></p>

<p>On a mac, a similar piece of screen capture software would be Screenflow, although Khan works on a Windows machine:</p>

<p><a href="http://www.telestream.net/screenflow/" rel="nofollow">http://www.telestream.net/screenflow/</a></p>
