Many people think of YouTube as a big time-waster with nothing but videos of animals dancing and guys getting whacked in their privates.

But as time goes on, I become more and more conscious YouTube as a great resource in many respects. For example, in my work as a writer and analyst, I’ve been making good use of corporate videos on YouTube, where it’s possible now to access in-depth presentations by company executives, scientists, and other experts.

Thanks to a mention yesterday in Boing Boing, I’ve learned about Khan Academy, which now has over 1,200 educational videos on YouTube. Using a very simple “chalk talk” format, Salman Khan, an engineer and manager, provides 10-20-minute video presentations on a huge variety of topics, including science, history, math, finance, economics, and more.

These videos would be useful as quick reviews or knowledge fill-ins for students, both adult and child, or for parents who are trying to help their kids with their studies. I also find them useful as a writer who needs to be able to get up-to-speed quickly on economics and finance topics.

Khan creates his videos on a tablet computer with pen input. Here’s an example of a video explaining the basics of banking:

AB — 8 June 2010

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