In 1930, Steiner joined the faculty of the so-called Harry Alan Potamkin Film School, which folded shortly before Potamkin's death in 1933; there he met Leo Hurwitz and, inspired by Hurwitz' ideas of utilizing film as a means of social action, left the Film and Photo League and joined Nykino, a loose coalition of New York-based cinematographers who pooled footage for use in left-wing newsreels shown at worker's rallies, conventions and during strikes. Precious few of these films have survived, most being destroyed in a warehouse fire in 1935. During this time Steiner also worked on some topical, fictional "pool" film satires, including Pie in the Sky (1935), the earliest film to involve the talents of Elia Kazan.