Forex Trading Introduction

Do you know a site that can teach FOREX properly?
It seems that all FOREX sites expect from us that we “do” understand the trading process. For me I know nothing about currency trading. I almost signed up with every site, opened a practice account and went through all the tutorials and teaching materials. But I always feel that they are missing a real introduction for a real beginner. So, any one can help? Pleeeeease !!!!
The best free websites for me are http://welearnforex.com/ and http://freeforexebook.org/.
The best trading courses (not free) are the Forex Mentor and the Superforexsystem.com.
Forex trading Introduction to the Psychology of Risk Part 2 by Denise Shull