From Steve Sailer:
The most glaringly obvious way to improve our schools is to improve their students via smarter immigration policy.
And if one studies the most recent international PISA scores, the obvious recruiting grounds for smarter school-age children are the countries at the top of the chart.
Whether we want a whole bunch of Yellow kids (see the graph before exploding) is a question for another time; but it sure as hell beats bringing in kids from Africa and South America, as we are.
That is, assuming we want our schools to improve.