Lesson activities to accompany the vignette "Dark Days at Second Narrows” from the acclaimed Knowledge Network series; Working People: A History of Labour in British Columbia produced by Landrock Entertainment. The lesson examines the events that led to the collapse of the Second Narrows Bridge during construction in 1958. The lesson activities allow students to explore the causes of the event and the effect it had on workplace safety in the province. Extension activities draw on resources from WorkSafe BC. This is a unit created by the Labour History Project, a group of retired and current British Columbia teachers collaborating to develop a series of lesson plans, activities, and workshops focused on labour studies and labour history. See: https://www.labourheritagecentre.ca/educate/