Hundreds of students around west London have been donating their used revision guides to charity as part of the Big Book Handover.
More than 1,000 books have been collected and will now be distributed across Africa with education charity Books to Africa and in UK charity shops with the mental health charity Mind.
Other schools involved in the campaign include St. Augustine’s Priory, in Ealing, Cardinal Vaughan, Gumley House and Godolphin & Latymer.
The project is entirely student led with pupils in each school organising their own collections.
Organiser of the campaign, Ben Farmer, said: "I know many people get distracted revising but I didn’t expect to be coming up with a massive project during my GCSEs.
"This is a great chance for students to put to good use their old books which would otherwise go to waste. It is always important to recognise we are in a fortunate position to even sit these exams so I feel starting this campaign is a good way to take action on this issue."
Andrew Vale, head of retail at Mind, said: "We are very grateful for the kind contributions made by the students. It will certainly help us with our fundraising efforts to continue our work to support people who experience mental health problems, and raise awareness."
Tonson Sango from Books to Africa said: "We’re glad the Big Book Handover will be donating books to us. Books To Africa aims to ship one million books to Africa by December 2015 as its contribution towards the Millennium Development Goals.
"To achieve this, the charity needs to ship more than 62,500 books every month at a cost of £15,000 per month. The books received by students from London will make a huge difference."