Margaret Tupper taught school in
Colorado Springs as a young woman. She (and three of her sisters) spoke at the Woman's Congress in San Francisco in 1894. She presented at the Mothers' Congress of Utah in 1898, as president of the Educational Alliance of Denver, on "Sister Professions: The Home and School". She was the elected president of the
Denver School Board from 1906 to 1908, and was head of the district's truancy department. "For the first time in a city of the first class a woman has been elected president of the school board," announced the
Journal of Education. She worked for the abolition of secret societies among students in Denver. == Personal life ==