If you have taken an exam this year then this site may explain how those 9 through 1 grades will be awarded a little more for you. Your teachers may have explained it, but just in case, here it is…

http://qualifications.pearson.com/en/qualifications/edexcel-gcses/understanding-9-1.html?utm_source=teachitenglish&utm_medium=Email&utm_campaign=SEC_GEN_01JUN2017_postresults_Q

It is the Pearson Edexcel version but will be standard across the others as well, give or take a point.

RJ