I found some videos mentioned on the Cascade Group http://www.hestakaup.com/content/view/63/125/ to be interesting. They are videos of a North American dressage teacher helping Icelandic horses & riders as well as other breeds of horses.
Let's stay positive on the input even if you don't completely agree with the instructor. BTW, I only had a chance to view 2 of the videos, but only found a few things I personally did not agree with. I thought the riders were doing a nice job of integrating the instruction. Kaaren