Schools which do not offer pupils the chance to play competitive sport "cement the social inequality that holds our nation back", the head of Ofsted has said.
Sir Michael Wilshaw, who is due to present a report into sports teaching in state and private schools at the Festival of Education at Wellington College, said:
Heads who treat competitive sport with suspicion or as an optional extra are not only denying youngsters the clear dividends that come with encouraging them to compete, they are also cementing the social inequality that holds our nation back.
More state schools are now encouraging sporting excellence.
They use competitive schools sport to energise the entire school culture.
They demonstrate that high school fees and large playing fields are not a pre-requisite to success.
More top news
UK defence secretary says so-called Islamic State group will only be defeated by force.
Sheriff's deputies were called to the scene in LA County after residents reported hearing muffled crying.
Further one in eight expect to be aged between 71 and 80 years when they finally stop work, according to survey.