Go to the original website for links to the manual that describes the science behind EFT and how to do the "Classic" method. 

"Just click on the appropriate links in the left hand menu and you can go, in step-by-step fashion, as far as your interest takes you.  In other words, study as much of this foundation as you like and come back when you wish.  In the meantime, you can use what you've learned and, when you return, you can easily resume where you left off."

On that page, find this paragraph with the links:

Parts I and II contain the EFT TAPPING FOUNDATION for everyone.

In this section, self-helpers and professionals can learn all the basics..  Even 10 year old children can learn How to do the EFT Basics - The Basic Recipe and get results with Tapping. Further, we include in this section sophisticated details on delivering this vital healing tool with even greater skill.  You will learn how to find hidden Aspects within the EFT Tapping Process as well as methods for Testing Your EFT Tapping Work and breaking down complicated issues into the Specific Events underlying them.