Teach of America is not a Great Society Program about education.
The Great Society was a series of government programs established by President Lyndon B. Johnson in 1964-65, to help people in the United States. The main goal of these series of programs was to decrease poverty and injustice about race. President Johnson coined the term “Great Society” during a speech at the University of Ohio when referred to the program. However, Teach of America is not a Great Society Program about education.
The connection between steel and the railroad system is the railroad system couldn't exist without steel. That's why things like the Bessemer process where invented because steel needed to be produced fast.