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Question: This school year, how often did your teacher do the following things in your mathematics lessons? - The teacher showed us how some problems that look difficult can be solved more easily by understanding how the number system is organized.
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 States48.9%
2 Canada48.7%
3 Australia48.3%
4 United Kingdom45.0%
5 France41.2%
6 Sweden 38.8%
7 Italy38.6%
8 Republic of Korea38.0%
9 Germany35.9%
10 Japan34.3%

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 = 3.800585 X +5.067
Correlation coefficient (r)0.509
Coefficient of determination (R2)0.259

GDP per capita (current US$)
No. of data10
Regression equation
Y = 194279.476490 X -32219.937
Correlation coefficient (r)0.746
Coefficient of determination (R2)0.557

Life expectancy at birth - Both sexes (years)
No. of data10
Regression equation
Y = -20.170464 X +90.425
Correlation coefficient (r)-0.485
Coefficient of determination (R2)0.235

Fertility rate, total (births per woman)
No. of data10
Regression equation
Y = 2.133773 X +0.588
Correlation coefficient (r)0.398
Coefficient of determination (R2)0.158

Suicide, age-standardized (per 100 000 population)
No. of data10
Regression equation
Y = -1.784827 X +11.846
Correlation coefficient (r)-0.021
Coefficient of determination (R2)0.000