One in five Australian 15-year-old students was found to be failing to achieve what the OECD describes as a basic level of mathematical literacy to enable students to actively participate in 21st century life. In many cases, these students are also unmotivated and disengaged with schooling, perceive their school experience in a negative light, and have low aspirations for the future. In a disproportionate number of cases, low-achieving students come from low socio-economic backgrounds, have an Indigenous background, and live in rural areas. This paper investigates the relationship of these and other demographic and educational background variables with being a low achiever, using data from PISA 2012. Lifting achievement in mathematics may also improve motivation and engagement.