Turkey had a mean score of 425 points in PISA 2015, compared to the OECD average of 493 points. Performance in science has remained stable across PISA cycles, with an average score change of 1.5 score points, while performance in reading and mathematics has stayed the same. Compared to other countries and economies participating in PISA variation in science performance in Turkey associated with the socio-economic status of students, as measured by the PISA index of ESCS decreased strongly between 2006 and 2012 (-6.1%). Socio-economic status had one of the lowest impacts in the OECD on science performance in PISA 2015, explaining 9% of the variance in performance (OECD average: 12.9%), and there was no significant gender difference in science performance in PISA 2015. Immigrant students make up 0.8% of the student population of 15-year-olds in Turkey, a proportion which is among the lowest in the OECD (OECD average: 12.5%). Performance differences between immigrant and non¥immigrant students are close to the OECD average. Immigrants scored on average 31 score points lower than non-immigrants in science in PISA 2015, compared to the OECD average of 31 score points.
Enrolment of 3-year-olds in ECEC was lower than the OECD average in 2015, at 11.74%, (OECD average: 77.8%). Children typically attend pre-primary education (Okul Öncesi Eğitim) starting at age 3. The programmes last between one and three years. Education-only programmes exist nationally. There is a formal curriculum in place for these programmes, and it is delivered by qualified teachers. Integrated programmes, which include education and childcare services, do not exist nationally. Compulsory education in Turkey begins at age 5-6 and ends at age 17, longer than the typical duration across the OECD. Students are first tracked into different educational pathways at age 11, earlier than the OECD average of age 14.
VET is offered in four-year VET programmes, and apprenticeships. Apprenticeship programmes are available to students who left the education system after primary education. Since 2016 all apprenticeship programmes are compulsory, and the standard length is four years (compared to the previous duration of two to three years), with most of the time spent in the workplace. In the OECD Survey of Adult Skills in 2012 and 2015, adult literacy scores in Turkey were lower than the OECD average, at 227 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 higher than the OECD average. The proportion of the population aged 25-64 with lower secondary education as the highest level of attainment in Turkey is lower than the OECD average, with an attainment rate of 13.7% in 2016, compared to the OECD average of 14.3%. NEET rates (the proportion of those aged 18-24 that are neither employed nor in education or training) are the highest in the OECD, at 33%, compared to the OECD average of 15.3%. The percentage of the population aged 25-34 with a tertiary-level qualification is among the lowest in the OECD, at 30.5% in 2016, compared to the OECD average of 43.1%. Employment rates for 25-34 year-olds with tertiary education are among the lowest in the OECD. In 2016, 74.1% were employed, while the OECD average rate was 82.9%.