Beverley Kirsch has taught Xhosa at the medical schools of the Universities of Cape Town and Stellenbosch as well as at various multinational companies and various other institutions. Silvia Skorge, linguist, was Associate Professor in the Department of German at the University of the Western Cape and has been involved in producing textbooks in several other languages. Sindiwe Magona, one of South Africa's well-known contemporary authors, taught Xhosa at school and university level until she took up a position at the United Nations in New York in the 1980s. Theresa Soci is an experienced Xhosa teacher and translator. Their collaboration spans more than 25 years.