I'm not a parent, but I'm relaying what my experience as a kid was.
I was expected to do all my own homework and assignments. If I needed to go somewhere in order to get research materials (we had a limit on the number of online sources), I could ask to be driven, and I'd be given money for extra materials if they were required or I could give a good case to why I wanted to use them on my project. The only help I got on the actual content was asking my dad to proofread my final copies if he had time after work - mum can't proofread, and dad worked odd, long hours, so it was luck of the draw.
Geek-bro, however, had a lot of help. A lot. Sitting beside him and helping him to the research and write it up help. The reason for this, was if he didn't have someone sitting beside him telling him to do his assignment, Geek-bro just wouldn't do it. My parents tried the hands off approach with him in the earlier years, but that resulted in phonecalls home because he didn't hand in homework or assignments. They, and his teachers, tried all sorts of things to make him be more responsible, but no collaboration of their part had any effect - not even making him go to school during the summer to do his missed assignments made him do them on time the next semester. A part of it was he'd forget -that's a side effect of ADD - but he's also incredibly lazy. As he got older my parents 'weaned' the help - from helping him do the content to just sitting next to him at specific periods of the week to do them - but if you didn't force him to the table to do his assignments, he still just wouldn't bother. He's quite smart and entirely capable of doing well, so it was very frustrating for my parents.
They tried not scheduling time to sit and make sure he did his assignments when he was 14, and its true he did do all his assignments that year... But he started each and every one of them the day after they were due. All of them. They were advised they go back to scheduling time to sit down with him and watch him work again.
I've no doubt that if I needed that sort of attention to do my assignments, I'd have gotten it. But if we were just struggling with the content, my parents expected us to be able to use our own resources to handle it - and if not, speak to our teacher ourselves.