Pupils at a city school got themselves in a spin when their new turbine went live.
Houghton Kepier Sports College is the first school on Wearside to be using wind power with the switching on of their new 15metre-high turbine.
The 6kw turbine is one of two being installed at the Dairy Lane secondary school to help power the building in a greener way.
Sundog Energy has erected them on the school field and the first was officially switched on by the pupils this week.
The turbines are expected to generate 9,400 units of electricity each year, which is enough to make 470,000 cups of tea, and save 5.2tonnes of carbon dioxide.
A monitor in the school building will help pupils keep track of how much energy the turbines are generating and the amount of carbon dioxide they are saving.
Headteacher Sue Hyland said: "We are working on a number of initiatives to make our school greener and the switch-on of these impressive wind turbines is an enormous boost to our efforts.
"The turbines will reduce our carbon footprint, save us money on electricity bills and help us to inspire pupils about environmental issues."
The pupils have also welcomed the new turbines, which have been part funded by the Co-op.
Rebecca Miller said: "I think they are great economically and technologically. They may cost a lot at first, but I am sure they will help save hundreds of pounds."
Fellow pupil, Beth James, said: "I think the wind turbines are very good and were an excellent idea."