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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 France54.9%
5 Germany54.2%
6 Canada53.9%
8 Italy 52.5%
9 Japan51.8%

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 data7
Regression equation
Y = 15.282306 X -1.680
Correlation coefficient (r)0.784
Coefficient of determination (R2)0.615

GDP per capita (current US$)
No. of data7
Regression equation
Y = 835275.139067 X -400911.057
Correlation coefficient (r)0.807
Coefficient of determination (R2)0.651

Life expectancy at birth - Both sexes (years)
No. of data7
Regression equation
Y = -109.306804 X +140.618
Correlation coefficient (r)-0.775
Coefficient of determination (R2)0.601

Fertility rate, total (births per woman)
No. of data7
Regression equation
Y = 12.167309 X -5.105
Correlation coefficient (r)0.857
Coefficient of determination (R2)0.734

Suicide, age-standardized (per 100 000 population)
No. of data7
Regression equation
Y = 63.110826 X -24.665
Correlation coefficient (r)0.279
Coefficient of determination (R2)0.078