This paper discusses the contributions of the Dominican Sisters and Sisters of Mercy in running schools for female deaf children in Ireland during the period 1846 to 1946. The schools were established as part of an attempt to educate Catholics in the Catholic faith and provide literacy to female deaf children. In assuming the challenge of educating deaf girls, the sisters adopted a method of teaching and learning through signed language of which they had little prior knowledge. While the history of the schools is contextualised as a central narrative of this paper, the religious orders' attempt to educate deaf children effectively is examined in the context of teacher role models and sign language pedagogy. This paper argues that the work of the Mercy and Dominican sisters should be recognised for its contribution to the education of female deaf children, whose needs would otherwise have been neglected.