200,000 Students a Month: Learning Science and Math on YouTube

salman-khan Sometime last month, Shankar posted a tweet about the Khan Academy. Have you ever heard of it? I followed the link and learned about Salman Khan, a man who gave up a successful career in Silicon Valley to teach people using Youtube videos. He’s posted over 1200 videos covering everything from basic arithmetic and algebra to differential equations, physics, chemistry, biology and finance.

Why does Khan do it? He’s not in it for the money. According to a recent interview, Khan said You know, I think I’ve always enjoyed teaching.

I believe him. His videos are not the dry lectures you’d expect from a geek. His enthusiasm shines through in the 10 to 20 minute videos. Here’s a video overview of the academy:

Link to this video at Youtube

When talking about his teaching style, he says:

I teach the way that I wish I was taught. The lectures are coming from me, an actual human being who is fascinated by the world around him. The concepts are conveyed as they are understood by me, not as they are written in a textbook developed by an educational bureaucracy. Viewers know that it is the labor of love of one somewhat quirky and determined man who has a passion for learning and teaching. I don’t think any corporate or governmental effort–regardless of how much money is thrown at the problem–can reproduce this.

Students all over the world are viewing Khan’s videos and are finding that they are learning previously difficult subjects much more easily now.

To find out more, visit the Khan Academy website.

Root and Unlock Nexus One [Video Tutorial]

The folks behind Android and me, definitely know Android very well. Even before the masses have gotten hold of the new baby from Google, Android and me has already rooted and unlocked the .

There are some important things you will need to perform before rooting the Nexus One, these include:

  • Installing the USB drivers for Nexus One which can be downloaded from Google or XDA
  • Confirm your device is recognized by ADB. See CyanogenMod Wiki or XDA for help
  • Backup all your interesting data from the phone

Once you have done that, watch the video below to learn how to root and unlock your Nexus One phone.

For complete step by step instructions on rooting Android and Nexus One, head over to this article on Android and me.

Jailbreak iPhone OS Firmware 3.1 and 3.1.2 Video Tutorial

If you are not yet comfortable with jail breaking your iPhone OS Firmware 3.1.2, using Blackra1n, here is a video tutorial which I came across on Softpedia. The video tutorial details, on how you can jailbreak your iPhone 3G and 3GS phones, which are updated to Firmware 3.1 or 3.1.2.

The video tutorial details how you can jailbreak iPhone 3G/3GS with OS 3.1 and 3.1.2 using Blackra1n.

The instructions in the video are pretty simple to understand. You may want to watch the video a couple of times, before you can start jail breaking your iPhone.