Apparently DD2 year 10 have been told across the board that achieving anything less than a 7 isn't good enough and failure at that subject as far as her school is concerned . Also if a pupil gets less than 70% in a test they are given a 'detention' though not called one.
This is because the school requires a least a 7 to study any subject at A level. That being the be all and end all.
It is a grammar school but nonetheless degrading the potential attainment of grades is not the right way of motivating pupils.