Introduce students to early union leaders (Gompers, Powderly) and the struggles they faced as they came up against strong monopolies and supporters of laissez-faire policies. Review how some strikes turned violent with the Haymarket bombing in Chicago and the Homestead Strike in Pittsburgh. In the lesson split the students into two groups (group A and B) and give each group a document that provides the perspective of either the workers or the employers at the Homestead Strike. Have each group develop an argument and gather evidence about who was responsible for the strike, the workers or the employers. Finally, have students debate the essential question and each side is responsible for writing down the other side's evidence as they listen to the debate.