WJEC -The Welsh Joint Examination Committee, are one of UK's biggest exam providers.  The WJEC GCSE English and English and English Language (Higher), essentially shows the student how to get a higher grade.  It gives examples of A, B, C, D exam responses and carefully sifts through why each response was appropriately awarded.  From West London English Tutor, English and Media Teacher in Harrow, London
http://paltip.com/westlondonenglish/!50w3