I wish parents would follow the lead for their child. If a child can sit down and do their homework on their own and the child is happy with it, leave it alone. Allow the child to get the grade they earned.
I NEVER, not even once ever had our daughter correct her homework, UNLESS she requested I look it over and to tell her if anything was wrong with it. She knew I would, if she asked. And I did look, but I did not correct it.
If the child asks for help, help the child figure out the solution.
If the child is realizing that they are missing a lot of the answers by getting them incorrect, ask the child if you can help them. Start off by looking at the completed work or a few problems, or few sentences and then tell them. "I see 2 incorrect answers from here to here, see if YOU can figure out where they are." If the child cannot figure it out, help them "find" the mistake. If she could not find a mistake, we together would go through the page, till she figured it out.
I completely understand it is very time consuming and working parents really struggle to get everyone home, dinner prepared and served, then ready for the next day. It is easy to fall in the trap of just let me show you, this is how it is done... But a child must learn to correct their own work. My mom was a divorced parent working full time and did not get home until 6:00. I have lived that life.
Yes, there are children that do need their parents to sit with them so that the child can stay focused, but with straightforward and consistent expectations, the child will gain confidence and an understanding of expectation with their homework.
If the child can learn to sit in class and pay attention in class, they should certainly be expected to do the same thing at home.
Class projects is what took our daughter a while to get the hang of, time wise. Hearing it was not due for a week, was too abstract in the beginning. So we worked on that for a few years.
I recall in 3rd grade she came to me with a request to go to the craft store on Sunday late afternoon and I told her, nope, sorry. We are in for the night, use what we have. She seemed so shocked I would not jump in the car. I told her she had over a week to get this project done. I had asked her when the project was originally assigned what would she need to complete the project? She said she would let me know and I told her, do not wait until it is last minute. She never did that again.
I do recall some projects that were VERY obviously done by the parents. A Japanese zen garden project. Ours looked like our daughter had designed it and put it together. Some of the projects looked like professional florist had designed them. So embarrassed for the parents. The long 8 foot tables were lined up in the hallways and parents were saying they wondered if the parents were pleased with THEIR grades..