I'm currently trialling a quicker way of comment-based marking. I usually know in advance what the main issues will be with a piece of work. Eg simplifying fractions. May well be cancelled but not to their lowest terms. In the pupil's book, the work will be peer/self marked in the lesson, I will then use a self-inking stamper that says "To improve I need to..." and then I'll put a number. The following lesson, the numbered statements will be displayed on the board. Pupils are given 5-10 minutes to read through the comments, and write down those which correspond to the number in their book. It attempts to make sure that pupils are engaging with the comments and that marking is meaningful.