SHARE has produced a booklet on Exam Stress which you can download by clicking here plus further information around Exam stress from Childline, Samaritans DEAL and PSHE writer, Sian Rowland is available here.
Dealing with Exam Stress - The Student Room Website
In addition, have you heard about BBC Bitesize? This fantastic BBC website covers all sort of subjects up to GCSE level giving practical advice on revision, exam hints and tips and shared stories from other young people.
The BBC Website generally has some excellent articles, programmes and clips around Exam Stress for parents and young people.