I found a nice video using the Kratky method,
https://www.youtube.com/watch?v=oeLd2SP0c6U Part 1
https://www.youtube.com/watch?v=zdsggB9vTPU Part 2
I added one more
https://www.youtube.com/watch?v=Vw35i32eRT4
This message was edited Mar 9, 2015 7:52 PM
Kratky Method
Here is another really good Kratky Method video from Hawaii
https://www.youtube.com/watch?v=6LTq3WKxYV0