don't usually scab marks then again my teachers are just plain stupid and marking the paper wrong, they seem to have the problem of using "ouside sources" such as from tutors or study books, also they follow the most annoying marking guidelines ever, it is so specific on what your answer must consist of in order to get the marks, regardless as to whether what you wrote actually acceptable for the question, so that's where i point out my problems, though once i did pick up around 7 marks for maths when the teacher starts to mark one wrong after another
a funny thing is that this person in our school tried to scab another mark on this question along with other people where many didn't answer the question properly, he actually got an 1/2 more mark more than the rest when he had around the same answer for the question, in the end instead of getting more marks the teacher took 1/2 mark off him to stop others from complaining