Iceland scored below the OECD average in science in PISA 2015, with a mean score of 473 points, compared to the OECD average of 493 points. Performance in science has declined across PISA cycles, with an average score change of -7 score points, while performance in reading and mathematics has also decreased. At the same time, socio‑economic status had the lowest impact in the OECD on science performance in PISA 2015, explaining 4.9% of the variance in performance (OECD average: 12.9%). The impact of ESCS on performance in science has not changed since 2006. Iceland’s performance gap between boys and girls in science was -3 points, compared to the average difference across the OECD of 4 points. Immigrant students make up 4.1% of the student population of 15-year-olds in Iceland, a lower proportion than the OECD average of 12.5%. Performance differences between immigrant and non-immigrant students are among the highest in the OECD. Immigrants scored on average 66 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 among the highest in the OECD in 2015, at 96.5% (OECD average: 77.8%). Children can attend preschool education (Leikskóli) as early as the age of 12 months and for up to five years. Education and care are seen as integrated in the national regulation of preschools (Leikskóli), and a national curriculum framework is in place that is delivered by qualified teachers and assistants (Icelandic national curriculum guide for preschool, 2011).
Compulsory education in Iceland begins at age 6 and ends at age 16, shorter than the typical duration across the OECD. Students are first tracked into different educational pathways at age 16, later than the OECD average of 14. Anyone who has completed compulsory education, has equivalent basic education, or is at least 16 years old, can enrol in upper secondary education. After completing compulsory education, students can choose between three streams: general academic programmes, vocational education and certified indentured trades. The streams last from three to five years. Students who have completed a general programme or a general programme building on vocational education take a matriculation examination and gain access to a higher education institution or a specialised tertiary-level institution.
Students who complete vocational programmes that include general education are awarded either a vocational certificate or a diploma of competences. With this, students can advance to programmes at the post-secondary-level or transition into the labour market. Students with a school certificate for a certified indentured trade can transition directly into the labour market or advance to a trade master's programme to become a master craftsperson.
Vocational programmes are the most diverse programmes in upper secondary education in Iceland. They can last from one to five years and are also provided in non-formal settings, such as adult education centres, evening schools and workplaces. They aim to prepare students for work or further study and can lead to professional qualifications. The proportion of the population aged 25-64 with lower secondary education as the highest level attained is among the highest in the OECD, with an attainment rate of 21.7% in 2016, compared to the OECD average of 14.3%. NEET rates (the proportion 18-24 year‑olds neither employed nor in education or training) are among the lowest in the OECD, at 5.2%, compared to the OECD average of 15.3%. The percentage of the population aged 25-34 with a tertiary-level qualification is close to the OECD average, at 43.3% in 2016, compared to the OECD average of 43.1%. Employment rates for 25-34 year-olds with tertiary education are relatively high. In 2016, 91.7% were employed, while the OECD average rate was 82.9%.