 Passadori was born in Mezzanino, Pavia, Italy.In 1922 she graduated from Escuela Normal de Profesoras “Mary O’Graham” of La Plata, college at which she taught during almost forty years, mostly Spanish, Italian, History, Geography and Literature.Also worked for other schools, such as the Escuela Normal de la Inmaculada in La Plata, the Escuela Nº 18 del Consejo Escolar Nº14 in Buenos Aires, the School of Journalism of the Universidad Nacional de La Plata, and the Universidad Popular Sarmiento, for which she was the President for several years.