Whilst in someways I like homework, it keeps me in touch with what dd is doing at school, I think that it can be counterproductive if there is too much pressure. Some kids love doing maths and writing, others don't, its when they 'have' to do it in their own time and parents are struggling with fitting it in, that it becomes too much.
DD (Y3), gets at least half an hour everynight. I say 'at least', as the teacher says it should only take 30 mins, but very often it is longer. They had homework in Pre-prep too, although it only really started being invasive in Y2.
Currently Mon - Weds she gets maths, either a revision work book with current learning i.e. multiplication/division/times etc., or the exercise to finish that she may not have in class - which is great as she tries to do as much as she can then and sometimes it may only be 3 or 4 sums out of 20! Last night we had about 20 mixed sums to do and one side of a work sheet with division with remainders! There is a x table test on Weds. (Currently 9's).
Thurs, we get literacy/spelling this could be finishing an exercise in her spelling book i.e. phonemes that sound the same, listing similar words different spellings etc. (these tie in with her weekly spellings which are tested on a Friday).
Over the weekend we have our spellings for the following week (15), which are tested as dictation which includes previous spellings, never done as a list and a new x table (these will be finished soon), a maths sheet and possibly comprehension of a story, answering questions, or writing a similar story using verbs, adverbs time connectives etc. They usually concentrate on a certain element of writing - last week was speech marks.
Everynight, they are expected to do 10 mins of reading - dd did hers in the car this morning, as we had a play with lego last night after tea (well something has to give sometimes!).
My Mum is horrified at the amount of work after school, but then she didn't make me do any homework at all and was fairly disinterested in my education, which as a result wasn't great, maybe that is why I don't mind it. However, life would be so much easier and pleasurable without it!! Oh and it always falls to me to be the 'homework police' as OH is never in early enough!