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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 what assumptions we were making 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 Japan48.1%
2 Germany 45.8%
4 Italy40.7%
5 France40.2%
7 United States38.3%
8 Canada36.5%
9 United Kingdom35.3%

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 data7
Regression equation
Y = -4.310675 X +8.338
Correlation coefficient (r)-0.699
Coefficient of determination (R2)0.489

GDP per capita (current US$)
No. of data7
Regression equation
Y = -142148.076059 X +108588.410
Correlation coefficient (r)-0.434
Coefficient of determination (R2)0.188

Life expectancy at birth - Both sexes (years)
No. of data7
Regression equation
Y = 16.102710 X +74.960
Correlation coefficient (r)0.361
Coefficient of determination (R2)0.130

Fertility rate, total (births per woman)
No. of data7
Regression equation
Y = -1.644707 X +2.144
Correlation coefficient (r)-0.367
Coefficient of determination (R2)0.135

Suicide, age-standardized (per 100 000 population)
No. of data7
Regression equation
Y = 9.375655 X +5.644
Correlation coefficient (r)0.131
Coefficient of determination (R2)0.017