As Head of Department do you think that an involvement in marking and moderating benefits your department?
Having teachers within your department marking, across a range of papers, gives you an increased understanding of the connections between syllabuses, subjects, levels and questions. It means that when you develop and mark mock examination papers, you have an expert, if you like, in each area. Those teachers can standardise the marking of others within the department. The insights gained through marking, applied to this process within a department enables you to obtain more accurate results from mock assessments, this in turn means that your predictions are much more accurate.
This also benefits students who can have realistic expectations about where they are going and what they need to do. It also provides teachers with an opportunity to offer targeted support to a student or group of students, in preparation for the examinations.