This is a fascinating article. You know the usual message that you should be involved in your kids' schooling and help them do their homework.
Here's research saying that doesn't help. The best role for parents is to stress the importance of schooling and learning to their kids and then get out of the way.
This reminds me that my older daughter claims that I got very upset when she got a C in her freshman year in high school. I don't remember this but my reply is, "Well, you never got another one.''
This shows that the conventional wisdom is sometimes not right. It is worth a read.