Pupils in 72 countries: maths at age 15 worsened significantly in 41 countries from 2018 to 2022
It improved in 7 and held in 24. From 2012 to 2018 it was different: worse in 7 of 61 countries, better in 13. Reading worsened in 35 countries after 2018.
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The OECD's international test checks 15-year-olds every three or four years on one scale. The 2021 round was moved to 2022 because of the pandemic.
Each bar is the number of countries where the mean maths score changed by more than the measurement error between two rounds.
- Countries: maths 2018→2022 worse / better / total countries
41 / 7 / 72
- Countries: maths 2012→2018 worse / better / total countries
7 / 13 / 61
OECD PISA: trend tables of the 2022 and 2018 reports. Significant: a change larger than 1.96 standard errors including the linking error. The count matches the OECD report text.
The two periods cover different sets of countries (61 and 72). The fall holds without the countries that missed sampling standards. Timing alone does not prove the pandemic caused it; Finland and Korea were falling before. Russia did not take part in 2022.
A question for this picture
Did maths fall for 10-year-olds in the same years?