Two private schools will have a role to play in training secondary teachers to work in state schools, as part of the drive towards more on-the-job teacher training.
The government wants the number of graduates being trained in schools to increase to 10,000, along with a further 5,000 recruits switching careers to take up teaching jobs.
Now the National College for School Leadership has accredited a further 150 schools as teaching schools, taking the total number up to 366, with the government planning to have 500 operating in total by 2015.
While the vast majority of these schools operate in the state sector, this latest cohort also includes private schools Wellington College in Berkshire and independent girls' school Guilford High School.
Dr Anthony Seldon, head of Wellington College, expressed the belief that this marked the start of "a new era" of cooperation between the state and independent sector.
He told BBC News that private and state schools had been handicapped throughout the twentieth century by working separately, but that they could now collaborate on achieving their shared priority, "namely teaching children to the best of our ability".
Guildford High, meanwhile, will be the flagship institution for a teacher training programme run across a number of private schools and academies operated by the United Learning Group.
The group's Paddington Academy in London and William Hulme Grammar School in Manchester will share leadership of this initiative, which will provide initial teacher training for 50 students in 2013-14 and a further 200 in 2014-15.
United Learning's chief executive Jon Coles commented: "Through the alliance, state and independent school teachers will come together as equals to learn, share experiences and develop their professional skills - for the benefit of all children and young people."
King Edward VI High School for Girls in Birmingham was the first independent school to be designated a teacher training school, being allocated this status two years ago.
Posted by Harriet McGowan