Which subject did Robin Williams' character teach in the film "Dead Poets Society"?

In the 1989 film "Dead Poets Society", the subject Robin Williams' character taught in 1959, at the fictional elite conservative Vermont boarding school Welton Academy, was English. As John Keating, Williams has a comedy-dramatic role where as an English teacher he inspires his students by teaching them to love and understand poetry.

In the film, Keating (Williams), is introduced to an all-boys preparatory school that is known for its ancient traditions and high standards. He uses unorthodox methods to reach out to his students, who face enormous pressures from their parents and the school. With Keating's help, students Neil Perry (Robert Sean Leonard), Todd Anderson (Ethan Hawke) and others learn to break out of their shells, pursue their dreams and 'seize the day'. Keating is an individual who will very often get involved in the lives and needs of his students.

The film was written by Tom Schulman, directed by Peter Weir, and produced by Steven Haft, Paul Junger Witt, and Tony Thomas. Cinematography was by John Seale, editing by William Anderson, and music by Maurice Jarre. Touchstone Pictures handled production.

Being a commercial success, the film grossed $235.9 million at the box office against a budget of $16.4 million. Theatrically, it was a winner. It received numerous accolades, including 4 Academy Award nominations: Best Director, Best Picture, and Best Actor (Robin Williams). Schulman won the Academy Award for Best Original Screenplay for his work.