As a high school Junior, my son attended two of Tom House's clinics: a 3-day one in our hometown during the school year; and, because he felt like he took so much from that one, a week-long one in San Diego in the summer. Then, because that had gone well, he was asked to return as an instructor/intern for the summer in San Diego after his Freshman year in college.
He credits a great deal of his success as a pitcher to his time with Dr. House and the numerous instructors he worked with in his clinics. As is the case with virtually all of the best programs, Dr. House takes a very holistic approach; so, the mental aspect, nutrition, weight-lifting, and other important elements other than mechanics are taught.