Great question James! Students do tend to overstep their bounds to find out how well they did on exams – and this can further delay grading. For multiple choice exams, one way I have dealt with this is to publish the exam answers just after the exam but prior to grading. Students are typically good at remembering their answers and can quickly assess how well they did on their own. This buys you a little time for grading. For essay exams, this can work but can be a little harder due to the subjectivity of grading these kinds of answers. In these cases, setting realistic expectations about when exams will be completely graded has worked best for me.