Mashabell:
Please be so kind as to not put words in my mouth.
I'm saying from KS2 lower (Y3/ Y4) - having assignments which include a written component is helpful. I also think gradually increasing the challenge (so that Y5/6 homeworks are significantly more challenging than Y3/4 - as in our case DD1 had the same exact homeworks in Y6 as Y4, with no homework at all during most of Y5) is important.
I get that in some areas the schools are very good and what happens during the school day is challenging, demanding, tiring, etc....
but Mashabell....
that isn't everywhere.
In my little corner of Birmingham - I'm watching an intake which includes DD2's primary (where homework like Llaregrubb) describes is typical vs. other local primaries (like the one DD1 attended YR - Y6) where homework is limited or non-existent. DD1 went to a primary in this latter group - and genuinely is finding the expectations of an ordinary state secondary (around 30 minutes of homework a night) a 'big ask'.
Obvious skills like being used to write an essay/ answer over one side of A4
being used to researching (knowing to look up several sources/ citing your sources/ marshalling your facts to support your view)
planning work over an extended period of time
coming up with ideas for very open projects - which require creativity/ artistic flair
etc... have all been totally 'new' for DD1 - we've had freak outs/ panics/ and pouting - but eventually got her to calm down, look at what the teacher is asking for and plan an appropriate piece of work to fulfill the assignment. Sometimes teacher's provide 'success criteria' and sometimes they don't - but gradually DD1 is getting a sense of what makes for a good essay/ project/ report.
I genuinely believe that gradually preparing a child for these expectations over KS2 isn't just about doing homework for homework sake - but is about tooling them up for the expectations of secondary schools.
And Mashabell - there is no doubt that homework at secondary (additional 30 minutes) makes a statistically signficant difference to outcomes: www.ascd.org/publications/educational-leadership/mar07/vol64/num06/the-case-for-and-Against-Homework.aspx and the data on primary is very limited.
However - one could simply look into the statistics on those preparing for the 11+ and their performance on KS2 SATs. That's a lot of extra work - many families do quietly - which does result in better students/ outcomes for schools.