When you adjust American PISA scores for demographics, you see that Americans of all ethnic backgrounds do better than the countries of their ancestors[1]. The mystery of why American schools are so bad disappears when you control for demographics.
This might also explain the mystery of why Finland scores so much higher than Sweden and Norway. There are much higher levels of third world immigration in the latter countries. The school system is not the only difference.
This might also explain the mystery of why Finland scores so much higher than Sweden and Norway. There are much higher levels of third world immigration in the latter countries. The school system is not the only difference.
[1] http://www.vdare.com/articles/pisa-scores-show-demography-is...