Homework is a dreaded word in this house. I only have 1 child, and she HATES homework. It is the #1 argument we have in this house. More time is wasted complaining and whining about it, than actually just sitting down and doing it. Ugh, I wish she would get that through her head, but it hasn't yet. Although, it has improved. BTW, she doesn't struggle in school, just thinks when school is done, work should be done. lol (on some level, I secretly agree)
When she was in elementary school, I would check over all her homework. If it wasn't checked, it would be the most sorry, half assed job.
Now that she is in middle school, I don't check it all over. The responsibility and consequences lie on her. My job of reinforcer is done. I will ask her everyday what homework she has (more as a mental checklist for her.) I do not check the routine assignments, and will only see it if she asks for help. I do help her study for big tests by quizzing her. I do help with proof reading her book reports. But the biggest thing I do is creating mini tests right before her math exams, as her teacher this year doesn't give a review to take home. I find 15 math problems on the chapter that will refresh her memory. We have found this really does help, and she does much better by having a quick review the night before. (lesson learned after a few exams)
I am glad my role is diminishing, and I plan on having it reduce each semester.