Here in Germany parents seem to help their children right down to the tiniest detail. My three DS however, on their first day at school, covered their homework with their arms and leant over the table and told me it was "their" work and they didn't need me!
So I came to hate parents' evenings when other mothers started asking about "Question 3b on page 22" and that sort of thing - of no interest to me at all!
However, now my DS2 is an English teacher himself, he occasionally rings me up to ask me a few things or to help him think of examples for his lessons!
Basically, whatever country you are in, surely it is best for the child to do as much of his homework himself as he can and to learn from his mistakes, as well as learning how to plan his time and work efficiently to be finished as soon as possible.