In the past few years alone, Khan has single-handedly recorded over 2,400 video tutorials and his YouTube channel, available at youtube.com/khanacademy – has logged over 67 million views so far.
A BS in Computer Science, Salman started with Microsoft Paint (as the digital whiteboard) and Screen Video Recorder to create the initial lessons (like the one embedded above). He now uses a Wacom Bamboo Tablet with Smooth Draw to create these doodles on the computer screen which are then recorded to video using Camtasia Studio on a Windows PC.
The videos, or rather screencasts, are then uploaded to YouTube under a Creative Commons license and the raw video files are also made available on Archive.org for students who wish to download them for offline playback.
How you can create Khan Academy style lectures?
Salman’s existing setup for recording screencasts is easy to replicate but if you have an iPad, there’s an even better option for you.
TechSmith, the company behind tools like SnagIt and Camtasia, have released a free iPad app called ScreenChomp that lets you create screencasts with audio narration on the go. You draw freehand on the iPad’s touch screen – the app offers 12 colored pens to choose from – and as you doodle, your voice gets recorded in sync with the drawing.