For extensive neuroscientific, philosophical, and educational context of Alexander Technique, visit the site for the Dimon Institute where AT is uniquely explored as a basis for The Study of the Self. Recommended: see this link to Ted Dimon's Anatomy of Directing.
Walter Carrington's AT training legacy
The Constructive Teaching Centre in London carries on Walter Carrington's training for teachers of Alexander Technique, a continuation of F.M. Alexander's own teacher training.
AmSAT - The American Society for the Alexander Technique