A culture of low expectations in many schools has meant that bright pupils are being let down and are failing to gain top grades at GCSE, according to a new Ofsted report.
The report suggests that clever students become used to performing at a lower level because they are in classes where the work is pitched at middle-ranking students.
Chief inspector Sir Michael Wilshaw said it was "shocking" that, in some cases, school leaders and teachers did not even know who their most able children were.
More top news
Game Of Thrones star Lena Headey has claimed movie mogul Harvey Weinstein was "furious" after she rejected his advances.
Tory divisions over a controversial benefit reform could be exposed in a Labour vote in the House of Commons on Wednesday.
Should no deal be negotiated, Dover, the UK's gateway to Europe, would be one of the places to feel the effects of this most.