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Re:Here’s why other countries beat the U.S. in reading and math by pcl on Wednesday December 12, 2012 @12:04PM (#4911151)
If you continue to extend your time scale, immigrants make up 100% of the US population.

(Assuming that "immigrant" != "first-generation immigrant, of course, which seems to be in line with your comment.)

Re:Here’s why other countries beat the U.S. in reading and math by dspeyer on Wednesday December 12, 2012 @12:09PM (#4911185)
That's true of all non-african countries.
Re:Here’s why other countries beat the U.S. in reading and math by chris_mahan on Wednesday December 12, 2012 @12:29PM (#4911302)
It's probably true of most African countries, with the possible exception of Kenya and the surrounding countries.