Staff from Queen Elizabeth Grammar School spent a night sleeping on the streets.
Teachers, including headmaster David Craig slept rough to raise money for the Community Awareness Programme (CAP).
It is the eighth time that QEGS have held the event, which has raised more than £6000 for the charity which helps the city’s homeless.
Kevin Dobson, Project Manager at CAP, said that the charity value the support they receive from QEGS.
He said: “We have always found the pupils and staff to be hugely respectful of the work we do , and extremely interested in the plight of the clients we help.”
The school has formed a strong relationship with CAP and pupils organise other fundraising events as well as the annual sleep out.
Mr Dobson said:“They provide practical help and assistance as well as fundraising.”
CAP provides help for homeless and disadvantaged people.
It also gives everyday support including hot drinks and meals.
Headmaster David Craig said: “The annual sleep out is our way of trying to support CAP.
“It is a really special local charity that is close to our hearts.”
Express readers also helped the charity by making donations to make up 630 Christmas hampers for struggling families.
If you would like to donate money, clothes or any other items, such as food, to the Community Awareness Programme, call 01924 381119.