Pupils at a Doncaster school asked Labour leader Ed Miliband to help them deliver a message to the Prime Minister.
The youngsters from Ridgewood Academy, on Barnsley Road, Scawsby, have been participating in a global campaign called Send My Friend to School.
They created pieces of art – on which they wrote messages to David Cameron – calling on the government to support efforts to increase the number of children in developing countries who regularly attend school.
They also asked the government to help increase the number of teachers in the developing world.
The work was given to Doncaster North MP Mr Miliband, who passed it to 10 Downing Street – and backed the children’s efforts.
He said: “The Send My Friend to School campaign is an excellent way for pupils to learn about the challenges children around the world face in accessing education.
“Just as it is anywhere in the world, the key to a good education is having a good teacher – but in many countries there just aren’t enough to meet demand, and that needs to change.”
Mr Miliband is one of hundreds of MPs supporting the campaign, which involves thousands of young people across the UK.
Last year he visited Stone Hill Primary, in Scawthorpe, to meet pupils also taking part in the campaign.
Figures show there are still more than 60 million children missing out on basic primary education, with millions more struggling to learn in crowded classes and with unqualified teachers.
Schools wanting to get involved in the campaign can visit www.sendmyfriend.org.