In response to onceamai:
At my children's primary school there were computers in every classroom so I am at a loss to understand why some of the teachers on here have to lug laptops around. I work for a very large HE establishment, not as a teacher, but I do a lot of work at home. I take it home on a memory stick. Bully for you. Not all primaries have a computer in their classroom, often they are totally unreliable.
As for lugging two or three lots of 30 books, if there's that much marking banked up I would suggest that there may be difficulties with time management. No, you are expected to mark work to the objective, you are expected to teach these lessons every day...hence the workload.
If 90 pieces of work need marking in one night - can't some of the work be completed on paper and then stuck into the book to ease the burden. Well done, excellent use of paper and glue, which schools clearly have unlimited supplies of. Not to mention all the time spent gluing the sheets in, having identified the usual nameless pieces.
The head at my dc's primary was obsessed with walking to school for children and families. 60% of her staff lived locally yet drove to work! Er, yes, because of all the crap that needs to be carried.
I also think the head's response was inappropriate. Agree.