Why encourage examining?

Why would you encourage your staff to mark or moderate examinations and assessments with an awarding body?

I'm a great proponent of teachers becoming involved in examining and moderating as I think it's a great opportunity for their professional development; both in terms of engagement with their subject, but also networking with other professionals which in turn opens up possibilities of sharing resources and ideas.

Staff training on generic issues in education is very important to the developmental journey of a teacher, but I think staff also enjoy training and development which is focused solely on their subject as we all enter the teaching profession because of a love for our respective subjects.  Being involved in examining and moderating; and the training opportunities it provides, gives staff an opportunity to participate in training devoted to their subject and is therefore very appealing.