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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 Germany45.8%
3 Sweden42.5%
4 Italy40.7%
5 France40.2%
6 Australia 38.7%
7 United States38.3%
8 Canada36.5%
9 United Kingdom35.3%
10 Republic of Korea25.3%

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 = 1.092624 X +6.227
Correlation coefficient (r)0.166
Coefficient of determination (R2)0.028

GDP per capita (current US$)
No. of data10
Regression equation
Y = 15191.197928 X +42984.765
Correlation coefficient (r)0.066
Coefficient of determination (R2)0.004

Life expectancy at birth - Both sexes (years)
No. of data10
Regression equation
Y = 1.877594 X +81.265
Correlation coefficient (r)0.051
Coefficient of determination (R2)0.003

Fertility rate, total (births per woman)
No. of data10
Regression equation
Y = 2.418647 X +0.532
Correlation coefficient (r)0.511
Coefficient of determination (R2)0.261

Suicide, age-standardized (per 100 000 population)
No. of data10
Regression equation
Y = -39.704901 X +26.640
Correlation coefficient (r)-0.542
Coefficient of determination (R2)0.294