No exam question is as perplexing as how to organise schools to suit the huge variety of pupils they serve: rich and poor, clever and dim, early developers and late starters. Every country does it differently. Some try to spot talent early. Others winnow out the academic-minded only at 18. Some believe in parent-power. Others trust the state. Finland has state-run uniform comprehensives; Sweden, another good performer, has vouchers and lots of private schools.
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