Professor Johnston began teaching at Eckerd College in 1978. She specializes in American History, American Studies, Native American History, Women’s History, Environmental History, and African-American History. She served as Director of the Women’s and Gender Studies Program, 1990-2007. She is Co-founder of Florida Consortium for Women’s Studies, a statewide coalition of department, program and center of women’s studies and gender studies. She served as Co-Chair of the program Florida without Borders: Women at the Intersection of the Local and global, February 9-11, 2007. She is author of Jack London: An American Radical?, Sexual Power: Feminism and the Family in America, Cherokee Women in Crisis: Removal, The Civil War, and Allotment 1838-1907. She is currently writing a book on the Buffalo Soldiers in World War Two.
Professor Johnston teaches several courses which explore gender issues including: Women in Modern America, Rebels with a Cause, Native American History, Becoming Visible, and Making History: The Sixties.