“A new report from the Institute of Education shows that while our 10-year-old students are achieving at the same level as many other countries, by 16 they have slipped well behind in mathematics. It is not all students who slip, but it seems to be our potentially high-achieving students who are falling behind. At the end of GCSEs, the top 10% of young people are about two years behind in mathematics compared with other countries in east Asia.”

How school league tables undermine our bright maths pupils’ performance | Matt Parker | Comment is free | guardian.co.uk.