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Question: This school year, how often did your teacher do the following things in your mathematics lessons? - The teacher asked us to explain our reasoning when solving a mathematics problem.
Choices: "Never or almost never" "Less than half of the lessons" "About half of the lessons" "More than half of the lessons" "Every lesson or almost every lesson"
Data: % of "More than half of the lessons" "Every lesson or almost every lesson"
Period:
Area:
10 countries/ areas
Highlight:
1 United States56.0%
2 United Kingdom55.2%
3 Australia54.9%
3 France54.9%
5 Germany54.2%
6 Canada53.9%
7 Sweden52.6%
8 Italy 52.5%
9 Japan51.8%
10 Republic of Korea26.3%

Note
The data of Azerbaijan are collected only in Baku. The data of Ukraine are collected from 18 out of 27 regions.

Source
OECD PISA 2022

Correlations with major national performance indices
Life satisfaction (10 steps)
No. of data10
Regression equation
Y = 2.536425 X +5.355
Correlation coefficient (r)0.544
Coefficient of determination (R2)0.296

GDP per capita (current US$)
No. of data10
Regression equation
Y = 79389.719564 X +8259.247
Correlation coefficient (r)0.488
Coefficient of determination (R2)0.238

Life expectancy at birth - Both sexes (years)
No. of data10
Regression equation
Y = -8.703576 X +86.459
Correlation coefficient (r)-0.335
Coefficient of determination (R2)0.112

Fertility rate, total (births per woman)
No. of data10
Regression equation
Y = 2.830014 X +0.029
Correlation coefficient (r)0.845
Coefficient of determination (R2)0.714

Suicide, age-standardized (per 100 000 population)
No. of data10
Regression equation
Y = -38.586231 X +30.868
Correlation coefficient (r)-0.744
Coefficient of determination (R2)0.554