She began her work career as Ida Kruse Between 1903 and 1907, McFarlane was Superintendent of schools for
Gilpin County, Colorado. She taught English during the 1905-1906 summer interim at the
University of Denver and formally joined the university's English faculty in 1907. She taught English literature and served as head of the English Department until her death in 1940. She taught modern poetry, drama, the French language, Spanish literature, and phonetics. She gave public lecturers about literature and art by 1914. In 1919, she published Modern Culture, the Arts of the Theatre, a compilation of her lectures. ==Personal life==