I agree the teachers shouldn't REALLY have revealed what was on the exam, but in all honesty the practical exams and coursework alike have similar, stupid problems like this. If the OCR exam is anything like my practical exam for Biology, it's just basically controlled coursework with an extreme amount of pressure to do well, and you have no idea what could come up on the exam, it could be anything. But the thing is I see the teachers revealing what is on the exam as no more immoral as teachers bending the rules for students with their coursework, eg. giving them draft after draft for their coursework, telling them exactly what to write, some going as far as giving them lists of things to include to get the marks. This issue doesn't get as much attention as it's not an "exam", but it's still as important and carries the same amount of weighting and marks.