Revision that is suitable for students in Y10, Double or Triple Science.
There are examples of questions from past papers in here, organized in topics. This resource is mainly for students on the Double Science course.
Questions and resources are here for all students of GCSE Chemistry or Double Award Science.  There is a mixture of questions from the Higher and the Foundation tiers.

Here is information about the CIE IGCSE course in Chemistry.

The GCSE courses in the sciences begin in January of Year 9.  This section of Moodle indicates the areas that will be taught, and when they will be taught.