Well, in my college my teacher actually telephoned the OCR exam board and talked to them about the grading in Januraray, there were people in my class who got a UMS equivalent to 70%, a B ended up with a D. This was found out because one was one mark from a C and wanted to see their paper and they actualy had 75% which should be a B almost an A, so what my teacher found out was that they based the UMS score and grade on past experience, funny thing was that I was the odd one from everyone. Last year in my AS I scraped a C and ended up with an A and UMS 75 whereas a girl in my class with a reasonabely high A in AS got a UMS 1 less than for an A. So my teacher figured I stormed the exam which I thought I had and she had messed it up very badly, but putting past experience into it - its all dependant on past results for some stupid reason. Sop basically its all that crap OCR were doing a few years ago to A-Levels. But, he found out to balance it up the Foundation Chemistry results are marked up in AS.