See http://studytech.org. Few schools in US uses study-tech and belongs to ASI. The ones who do are not accredited by local and national bodies.
ASI is one of the L Ron Hubbard companies, although non-profit, has to pay typically over 10% of income to the mother company, called the Church of Spiritual Technology.
LRH also founded Scientology, which also used study-tech, which critics accuse of being the path to mind control.