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. In 2006, a nationally representative sample of 14,170 15 year-old students was selected to participate in the OECD Programme for International Student Assessment (PISA). This sample became the fourth LSAY cohort. All subsequent waves of data were collected by telephone interviews. This series of documents provides supporting information for the LSAY dataset of the 2006 cohort at wave 1 (2006). It includes a questionnaire, codebook and frequency counts.