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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:
18 countries/ areas
Highlight:
1 Portugal22.7%
2 New Zealand20.0%
3 Italy19.1%
4 Chile16.8%
5 Australia15.5%
5 Sweden15.5%
7 United Kingdom12.5%
8 Israel11.8%
9 Lithuania11.6%
10 France11.3%
11 Republic of Korea11.2%
12 Turkiye10.5%
13 United States9.8%
14 Finland9.5%
15 Norway9.1%
16 Ireland8.0%
17 Hungary7.1%
18 Japan 2.1%

Note
United Kingdom: England only.

No data for 20 countries.

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

Correlations with major national performance indices
Life satisfaction (10 steps)
No. of data18
Regression equation
Y = 0.681005 X +6.547
Correlation coefficient (r)0.052
Coefficient of determination (R2)0.003

GDP per capita (current US$)
No. of data18
Regression equation
Y = -117777.436110 X +61393.235
Correlation coefficient (r)-0.218
Coefficient of determination (R2)0.048

Life expectancy at birth - Both sexes (years)
No. of data18
Regression equation
Y = 7.739350 X +79.770
Correlation coefficient (r)0.120
Coefficient of determination (R2)0.014

Fertility rate, total (births per woman)
No. of data18
Regression equation
Y = -0.347925 X +1.648
Correlation coefficient (r)-0.041
Coefficient of determination (R2)0.002

Suicide, age-standardized (per 100 000 population)
No. of data18
Regression equation
Y = -26.532380 X +13.837
Correlation coefficient (r)-0.274
Coefficient of determination (R2)0.075