The Australian Qualifications Framework classifies master's degrees as research, coursework or extended. Research master's degrees typically take one to two years, and two thirds of their content consists of research, research training and independent study. Coursework master's degrees typically also last one to two years, and consist mainly of structured learning with some independent research and project work or practice-related learning. Extended master's degrees typically take three to four years and contain significant practice-related learning that must be developed in collaboration with relevant professional, statutory or regulatory bodies.