The man appointed as the next Chief Inspector of Schools, Sir Michael Wilshaw, says he is determined to tackle what he calls coasting and ineffective teachers.

He was chosen by the government as the new head of Ofsted, which inspects schools and children's services, for his work as headteacher of Mossbourne Academy in Hackney. He is credited with turning it into one of the best performing schools in England, even though it is in one of London's most deprived boroughs.

Sir Michael says, with just 50% per cent of lessons currently classed as "good", there is clearly a need to tackle the problem of not just incompetent teachers but those who are not trying hard enough.

"It's far harder with a coasting teacher, where it's not immediately obvious that that person is teaching ineffectively," he told Today presenter Sarah Montague.

"That's the harder one and I think what we've got to do in schools is to ensure that there are strong performance management systems in school, very robust ones - and often they're not - to identify not just the hopelessly ineffective, incompetent teacher but those that are coasting and letting children down."

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