David Cameron has said it would be wrong to use a highly critical Ofsted report of a free school in Derby as a "stick to beat the whole free school movement".
Speaking to BBC Radio Derby, Mr Cameron said:
"Let's not use this as a stick with which to beat the whole free school movement, because actually there are now hundreds of schools in our country that are set up as free schools and on average they have more outstanding ratings and more good ratings than established schools.
"So they are good things but when it goes wrong - just as when a state school goes wrong - you've got to get in there, sort it out or close it down."
More top news
The body of a man from Chichester who died after travelling to Syria to fight Islamic State arrived back at Heathrow to a hero's welcome.
London Mayor Sadiq Khan hinted that he could go further in his bid to tackle pollution in the capital.
Donald Trump has left many baffled after appearing to refer to a terror incident in Sweden on Friday night, except no attack occurred.