What is behind the decline in student achievement in Australia?

•Falls in Australian student achievement have been widespread across the population.•Mathematical literacy fell at the top of the distribution, reading throughout it.•Declines in associated school performance were most marked in private schools.•These declines were not associated with other observed school characteristics.

Australian school student achievement in reading and mathematical literacy has fallen in the Programme for International Student Assessment (PISA) collection since 2000. This study finds that these declines were widespread in the student population, affecting both males and females. However, the decline in reading literacy occurred throughout much of the achievement distribution, while the decline in mathematical literacy was more pronounced at the top of the distribution (there were fewer high performing students in 2009 compared with 2003). Declines in both literacy domains were apparent across the entire distribution of schools, however, the falls in school performance were more apparent in private schools than in the government-run school systems in Australia. The declines were not associated with many other characteristics of schools, including many factors that might have been thought to be associated with school performance.