Secondary TimeShifts Click on the image below that corresponds to the lesson you are currently working on. Redlining and the Walls of Prejudice in the African American Experience - Birwood Wall, Detroit - 1941 Full Steam Ahead: The History and Settlement of Mid-Michigan - Flushing Train Depot - 1890 Frank W. Woolworth: The Man, His Business, and the Struggle for Women's and Civil Rights - Ferndale - 1928 The Transformation of Petoskey: Physical, Cultural, Economic, and Social Change - Petoskey Harbor - 1890