^a 9–1 grades phased in by subject between 2017 and 2019 in England ^b New A*–G grades in Northern Ireland from 2019 ^c A*–G grades as used in Wales since 1994, and in England and Northern Ireland between 1994 and 2019 ^d Before 1975, each exam board had its own grading system (some used letters, others numbers). Grades were only given to ... More @Wikipedia
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