Noble, DD's work - like DS's in the past - is usually simply marked with narrative feedback, exactly as I do in primary for virtually all work. However there do seem to be some 'assessment' pieces - which I understand, as we do the same - and end of term / unit tests - again I understand this, as we do the same - which are given 1-9 grades.
DS's equivalents were marked with NC levels in KS3 and old A* to G grades in KS4.
Maybe it's just me, but i would ALWAYS prefer a teacher to say 'To the best of my current knowledge and professional judgement i believe this to be level blah, but this has y degree of uncertainty' rather than 'Of course it's a level blah, because we know best'.
Goodbye, as i have said before, as all of your children - and all of your experience - has been within the narrow bounds of a superselective school, where predicting grades is relatively easy because the spread is so narrow. I don't understand how this is relevant to full-spectrum comprehensive schools, nor why you should so criticise teachers who teach in such a school for being 'not proactive' because they cannot do the much harder job of grading children across the whole spectrum of grades?