If you finish work completely at 8.30 and go home to do something utterly unrelated to work, then I'm afraid I think that is more or less par for the course in term-time these days. And more teachers ought to keep work at school and then go home to a different life. Far too many spend hours each evening working in their own homes, doing all kinds of bits that don't need doing. Make sure you save everything carefully this year, in order to be able to use it again next year. Then you are already several hours better off each week. As for the marking, stop marking everything so carefully and precisely. Your school's policy is once very 6 lessons or two weeks, so why aren't you following it? Teaching is making sure no-one has a fight in every lesson, children learn something in most lessons and marking happens often enough that SLT don't tell you off. It is NOT checking progress happens every two seconds and that books are a Turner award winning art piece in pink and green marking pen!