A major study into the educational achievements of teenagers across the world has found that UK students have "failed to improve" since 2009, and remain around average in maths and reading, and slightly above average in science.
The study found that the UK spends more per head on education than the average across OECD countries, at around £59,889 per student between the ages of six and 15.
The OECD average is £50,951.
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