If you register an account with Edexcel Shop on the edexcel website, you can download some revision notes and glossaries for free.

GCSE Art and Design - Glossary
GCSE Business Studies - Glossary and Revision Notes
GCSE English - Glossary and Revision Notes
GCSE French - Revision Notes
GCSE Geography - Revision Notes
GCSE German - Revision Notes
GCSE History (Modern World History) - Glossary and Revision Notes
GCSE History (Schools History Project) - Glossary and Revision Notes
GCSE Maths (intermediate level) - Glossary and Revision Notes
GCSE Maths (higher level) - Glossary and Revision Notes
GCSE Religious Studies - Glossary and Revision Notes
GCSE Science (higher level) - Glossary and Revision Notes
GCSE Science (foundation level) - Glossary and Revision Notes
GCSE Spanish - Revision Notes


Hope this helps.
CR