In the 2015 Programme for International Student Assessment (PISA), Australia scored higher than the OECD average in science, with a mean score of 510 points, compared to the OECD average of 493 points. Performance in science declined across PISA cycles between 2006 and 2015, with an average three-year change of -5.7 score points. Performance in reading and mathematics has also declined across PISA cycles. Socio‑economic status had lower-than-average impact on science performance in PISA 2015, explaining 11.7% of the variance in performance (OECD average: 12.9%). The impact of economic, social and cultural status (ESCS) on performance in science has not changed since 2006. There was no significant gender difference in science performance in PISA 2015. Immigrant students make up 25% of the student population of 15-year-olds in Australia, a proportion which is among the highest in the OECD (OECD average: 12.5%). Unlike in many OECD countries, in PISA 2015, there was no significant performance gap between immigrant and non-immigrant students in science, with a score difference of just -5 points.
Enrolment of 3‑year‑olds in early childhood education and care (ECEC) was 68.4%, (OECD average: 77.8%). However, participation rates in pre-primary education at age 4 have risen from 53% in 2005 to 90% in 2015. This was 3 percentage points above the OECD average of 87%, representing the fourth-highest increase in the OECD. Preschool programmes are delivered in education institutions or long-day-care settings. Children typically begin preschool education at around age 4 and attend a one-year programme. A national set of standards and a framework are in place to monitor education and care for children aged 0-5. Both education-only and integrated education and care pre-primary programmes exist nationally. Compulsory education in Australia begins at around age 5 or 6 (with minor variations between the states and territories) and ends at age 17, longer than the typical duration across the OECD. Students are first tracked into different educational pathways at age 16, later than the OECD average of age 14. Students who complete high school can advance to senior high school or college, or vocational education and training (VET). However, upper secondary education is not compulsory in Australia. The two upper secondary programmes lead to two different certificates, one for senior high school and the other for vocational courses. Completion of vocational education only allows access to a professional vocational course, while completion of senior high school allows access to both professional vocational courses and university.
VET is provided at the general secondary and tertiary levels in Australia, through work‑study programmes, Technical and Further Education institutes and private Registered Training Organisations. In the OECD Survey of Adult Skills in 2012 and 2015, adult literacy scores in Australia were among the highest in the OECD, at 280 points, compared to the OECD average of 268 points. The gap in literacy skills between older adults (age 55-65) and younger adults (age 25-34) was lower than the OECD average. The proportion of the population aged 25-64 with lower secondary education as the highest level of attainment in Australia was close to the OECD average, at 15% in 2016, compared to the OECD average of 14.3%. NEET rates (the proportion of those aged 18-24 that was neither employed nor in education or training) was lower than the OECD average, at 10.9%, compared to the OECD average of 15.3%. The percentage of the population aged 25-34 with a tertiary-level qualification is among the highest in the OECD, at 49.3% in 2016, compared to the OECD average of 43.1%.