Vocational teaching. Youths taking notes and being shown a demonstration on a course for student mechanics and millwrights. Millwrights are responsible for the construction and installation of machinery, historically including mills but later including more mechanised industrial units. This class is being taught at Fall River Technical High, Fall River, Massachusetts, USA. Photographed on 14 June 1916 by US sociologist and photographer Lewis Wickes Hine (1874-1940). Hine was a photographer for the National Child Labor Committee (NCLC), documenting working and living conditions for children, and campaigning against child labour and poverty in the USA.