It's amazing what you find out from reading the back of the pupils' books. You also get to read petty little, poorly punctuated, written squabbles between pupils. You find out their silly nicknames for each other which can be tremendous fun to drop in during whole class discussions. You find out who fancies who, and if you're feeling particularly childish you can add 'IDST'.
You've got to make fun for yourself whilst marking somehow.
