Year 10 and 11 are the GCSE Exams years and usually taken when youngsters are 14, 15 or 16. The exact details will depend up on the policy of the school your child attends and the level of attainment expected of your child. Some children sit GCSE Maths and English in year 10, leaving them free for more advanced work or additional GCSEs. Some subjects have 'Higher Papers' these must be taken if your child is aiming for high grades ie A*.
All books are currently for the A to G grade system for exams to be sat in 2016.
Additionally we have IGCSE books for overseas exams.