In a speech, Sir Michael warns that there is an "invisible minority" of disadvantaged children living in "leafy suburbs, market towns or seaside resorts" who are being let down by their schools.
These youngsters are under-performing and coasting through school until they leave at the earliest opportunity.
The quality of education is the most important issue facing Britain today. In the long term, our success as a nation - our prosperity, our security, our society - depends on how well we raise and educate our young people across the social spectrum.
More top news
The twin brother of the police officer shot and blinded by gunman Raoul Moat says his family are still waiting for justice five years later.
The success of the No camp is mainly due to Tsipras convincing people a No vote will strengthen their hands in negotiations.
As we move into the weekend, expect things to get rather more unsettled weather-wise - thought it will stay hot and humid for some.