The school system systematically fails to recognise the head teachers who make the biggest impact in improving pupils' chances, research suggests. Chris Cook investigates.
Kirsty Wark then interviews Sir Michael Wilshaw, the Chief Inspector of Schools in England, about the findings.
Newsnight is the BBC's flagship news and current affairs TV programme - with analysis, debate, exclusives, and robust interviews.
Website: www.bbc.co.uk/newsnight
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