Grice, S: The Training Spiral

"Dressage rider and trainer Sue Grice grew up on the traditional "scales of training" or "training pyramid," used the world over to provide a standard system of progression for developing the equine athlete, and in particular dressage and event horses that are working toward a superior ability to "collect." The scales and pyramid are not only boring to many riders, they can be confusing when it comes to actually implementing them as guideposts, so Grice has conceived a system based on the standard but with a focus on a better rate of success. This success is achieved when the rider is engaged with the system and understands how to continually adhere to it, even as advances (or falters) occur"--