Irish Catholic teaching sisters were major actors in the development of education systems in New World countries such as the United States, Canada, South Africa, Australia and New Zealand. Immigrants themselves, they faced a number of key challenges as they sought to adapt Old World cultural and educational ideas to the education of the immigrant Irish in a new cultural, religious and educational context. A close examination of the wide range of sources available in private archives and elsewhere offers unique insights into the challenges facing 10 Irish Dominican Sister Teachers as they journeyed from Ireland to Dunedin to found primary and secondary schools in the young colony of New Zealand. This article examines their responses to their early experiences and the part they played in the development of a viable Catholic education system in nineteenth-century New Zealand.