She acted as a kind of matron in a house she ran for young girls who attended the newly opened winter school.
[1] In 1888, together with her niece Johanne Siegumfeldt she studied embroidery and weaving at Hvilan folk high school in Burlöv Municipality, Sweden.
She and her niece introduced women to the basic principles of weaving, based on producing towels, aprons and table cloths.
[1] In 1913, la Cour participated in yet another pioneering project aimed at reviving Danish weaving traditions and patterns.
Together with Elna Mygdal and Sophy A. Christensen as well as the management of Dansk Husflidsselskab including Anton Rosen and Martin Nyrop, she established a weaving studio in Copenhagen.