Watch the Global launch on OECD TV. Student performance across OECD countries has continued to decline, reaching the lowest average ever recorded by the OECD Programme for International Student Assessment (PISA) in mathematics and reading. Across the OECD, one in five 15-year-old students is now a low performer in science, mathematics and reading, up from 16% in 2022. PISA 2025 was the largest assessment to date, involving 760 000 students across 91 countries and economies. This year’s edition f...