The Longitudinal Surveys of Australian Youth (LSAY) program studies the progress of several groups of young Australians as they move from school into post-secondary education and work. Since 2003, the LSAY program has been integrated with the Programme for International Student Assessment (PISA) conducted by the Organisation for Economic Cooperation and Development. This series of documents provides supporting information for the LSAY dataset of the 2009 cohort at wave 1 (2009). It includes the PISA 2009 questionnaire (Australian version) and frequency counts for the wave 1 data.