Past Papers and useful links:

Computer Science: Past Papers

History: USA Revision Booklet
History: GCSE Past Paper USA (2014) (Markscheme used)
History: GCSE Past Paper USA (2015) (Markscheme used)
History: GCSE Past Paper USA (2016) (Markscheme used)

Biology GCSE: Teachers Guidance Notes
Biology GCSE: Sample Papers
Chemistry GCSE: Teachers Guidance Notes
Chemistry GCSE: Sample Papers
Physics GCSE: Teachers Guidance Notes
Physics GCSE: Sample Papers