Our Roots YAI was launched in February of 1957 out of a small school in Brooklyn, New York. Initially staffed by Co-Founders Bert MacLeech and Pearl Maze MacLeech alone, their pilot program served just seven people. According to Bert, from its very beginning YAI has been dedicated to providing innovative services for the I/DD (intellectual and/or developmental disabilities) community. MacLeech envisioned a, “total life adjustment approach, emphasizing personal growth, social responsibility, employment goals, and the development of independence for the individual.” At a time when institutional living was the norm for people with I/DD, this vision was nothing short of revolutionary. YAI Today