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.
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