Justin and Dev gave a test to 2,300 students in India that combined questions from TIMSS, PIRLS and tests given in West Africa and Latin America. That allowed them to accurately compare learning outcomes across 80 countries. Fantastic work, but depressing results.
Some findings: in poor countries, more spending per student associated with higher test scores (not so much in rich); family *and* national income both associated with higher scores; learning inequality higher where income inequality is higher; [...]
...Lower test scores for girls are strongly correlated with higher
rates of child marriage and desired fertility; test-score divergence between private and government schools is significantly larger in more unequal countries.
But read Jusitn's thread!
(btw, you should really follow @dev_a_patel. He's doing incredible stuff.)
Here, by the way, is the graph of the link between income and test scores within and across countries. The Angry Donald Plot .
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