Students at Lisneal College have raised a record £22,220 for the Northern Ireland Cancer Fund for Children.
They undertook their third sponsored Readathon since the school opened in September 2004.
Pupils from Years 8 to 10 challenged themselves to read as many books as they could in a three week period.
At the school assembly on December 6, a cheque for £6,500 was presented to Rachel Smyth, Business Development Officer for the Northern Ireland Cancer Fund for Children.
The top fundraiser Charlotte Pilling from Year 10, whose overall contribution was £500, said: "It just broke my heart when I heard about all the children in Northern Ireland who have been diagnosed with cancer and to hear about what they have to go through. I knew I simply had to do my part to make life a little easier for these children and their families."
Gabrielle Rowan, also a pupil at the school, said: "When I heard about Read-On I thought it was a great idea and a great way to raise money for children with cancer. I decided to read four books and then went around my neighbourhood to collect sponsorship.
"I rasied £101.50 which I thought was a good amount to raise for such a worthy cause. I am glad I was able to help sick children in this way."
Two children a week are diagnosed with cancer in Northern Ireland. Therefore money raised from Read-On will provide practical support to children and young people with cancer.
One form of this support is Narnia, a 24-bedded log cabin located at the foot of the Mourne Mountains in Newcastle.
It is the first of its kind in Northern Ireland and it equips young people living with cancer with the skills that can help them cope with their illness.
In the past year 600 young people with cancer and their siblings have received support from qualified youth workers at Narnia.
For more information on the Northern Ireland Cancer Fund for Children, or to donate money to the charity, call Rachel Smyth on 02890 805599.