Not sure about the vcop over content argument at all. VCOP is skills based-and can be applied to any type of writing. In terms of marking, the long piece of writing that children do has ALWAYS been the biggest to be marked whether it is done in Big Writing or something else. It deserves to be marked properly as the children have worked hard to produce it. The Criterion Scale , which I assume you are talking about, should not be used evry week so the time for marking will probably be an hour and a half to two hours in my experience. Assessment of writing (when the tasks are assessed against the Criterion Scale) provide levels but much more importantly, they identify specific and individual targets for children to work towards. Schools should introduce the subject for Big Writing but the input at home should be talk based-not planning on papaere. The purpose of this is twofold-processing of information and iddeas fotr the writing task but also promoting talk at home.