Justine Greening quizzed on schools fundingpublished at 09:53 British Summer Time 17 July 2016
The Andrew Marr Show
She adds that social mobility is about what happens in homes, communities, businesses and teachers.
Ms Greening is pressed on the proposed cut. She says underlying schools budget is having a "real terms increase".
Ms Greening says the government is reviewing the schools funding formula to make sure it is fairer.
"Everybody recognises the need to change."