I have to say, with the number of threads I see on MN complaining about the teaching and lack of support and picking up of issues, in primary schools that so many are so willing to drop, what for many it would appear (aside from maybe 3 parents evenings a year) to support their child at home with what they are learning in school.
Maybe it's how the homework is set and inforced that makes the difference. DS1's Maths and Literacy (though this is sometimes actually History or another subject) is also something they have been learning in school that day/week. It is handed out on a Thursday and they have a week to complete it. 10 minutes a day is all it takes, though sometimes he does it at the weekend and spends 1/2 each weekend day - still leaving plenty of time for other things. It gives me an opportunity to see what he's doing, and the ease (or not) in which he does it helps me to see where he's struggling as well rather than just waiting for the next parents evening.
He also, voluntarily, spends time "revising" on the iamlearning website that school has signed up to.
I've never really had to help DS1 do anything with his homework, other than ask him if he's got any/done it, and supervise him doing it. And no - he's not super academic (currently he's going to be lucky to get 4c's or even 3a's in subjects at the end of year 6
).
DS2 is in the infants where they apart from reading and spellings only get sporadic homework to do. However, even though he's in the top maths set that gets taken out and given harder work to do he still wants more challenging stuff to do at home. Roll on Juniors where he gets set homework each week, I'm fed up of the strops because DS1 has got homework to do and he hasn't

I think in YR6 they do step up the level of homework, partly in preparation for SATS