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Question: How often do these things happen in your mathematics lessons? - It is too disorderly for students to work well.
Choices: "Every or almost every lesson" "About half the lessons" "Some lessons" "Never"
Data: % of "Every or almost every lesson"
Period:
Area:
8 countries/ areas
Highlight:
1 Italy19.1%
2 Australia15.5%
2 Sweden15.5%
4 United Kingdom12.5%
5 France 11.3%
6 Republic of Korea11.2%
7 United States9.8%
8 Japan2.1%

Note
United Kingdom: England only.

No data for 2 countries.

Source
TIMSS 2019 > International Database > TIMSS 2019 Data Almanacs - Grade 8

Correlations with major national performance indices
Life satisfaction (10 steps)
No. of data8
Regression equation
Y = 4.357707 X +6.087
Correlation coefficient (r)0.483
Coefficient of determination (R2)0.233

GDP per capita (current US$)
No. of data8
Regression equation
Y = 45450.534871 X +42678.248
Correlation coefficient (r)0.142
Coefficient of determination (R2)0.020

Life expectancy at birth - Both sexes (years)
No. of data8
Regression equation
Y = 0.607491 X +81.989
Correlation coefficient (r)0.012
Coefficient of determination (R2)0.000

Fertility rate, total (births per woman)
No. of data8
Regression equation
Y = 0.852722 X +1.369
Correlation coefficient (r)0.129
Coefficient of determination (R2)0.017

Suicide, age-standardized (per 100 000 population)
No. of data8
Regression equation
Y = -39.927799 X +16.390
Correlation coefficient (r)-0.398
Coefficient of determination (R2)0.158