The King's School has been recognised as the first school on the planet to set up a Merit First Council to champion sustainable development projects.
Currently working in 20 different countries worldwide with plans to extend their reach globally, The World Merit Charity aims to empower young people to build a better future.
King's has been working with them for last 18 months, working in the local community to support sustainable development through a wide range of challenging projects.
As the first school to set up a Merit First Council, King's will now be showcased as an example to other schools and youth organisations worldwide.
The King's girls have worked with Cheshire Streetwise to help the homeless, supported local foodbanks, held an eco fashion show, raised money for the Christie Hospital, collected litter and recyclable plastic around the town, raised money and donated clothes to the orphanage, 'DoubleJoy' and donated sanitary products to combat period poverty.
King's teacher Isobel Lally, who set up the King's School's World Merit Council with her colleague Lianne Hughes, said: "The girls are inexhaustible and want to get involved in any way possible to support sustainable development."
Lianne added: "This generation has woken up to the crucial issues facing mankind and as my generation knows only too well, it's not before time."
That view was echoed by student spokesperson Annabel Townsend, 15, who said: "It's our time to take responsibility and if not now, we ask the older generation, just when?"
The Chief Executive of The World Merit Charity Marlou Corneilssen, said: "We are trying to create a more equal world, which doesn't focus on how much money someone has but on what they can offer to sustain this wonderful planet."
Marlou added: "Using the United Nations' Sustainable Development Goals as our guide, we plan projects on a local and national level that create positive impact striving for a more sustainable future and a better world for all."
She concluded: "The King's girls are unstoppable and relentless in their support of our goals and we are delighted to make King's the first ever school to win our top schools' award."