Grammar(s) in the Classroom

Before I read the Hartwell article, I was under the impression that English instructors always unanimously consider grammar instruction to be vitally important.  It was a great relief for me to learn that is not the case.  I have often reflected on my own lack of formal grammar training, wondering why I never really received any growing up.  I have felt at a disadvantage as a student and future English teacher because of this, and have found myself wishing that I had gotten some formal instruction.  After reading Hartwell's article I find myself wondering if perhaps I was taught about grammar in school, and I just don't remember any of it. This may or may not be the case but either way I am much more confident now in my feeling that grammar instruction should not take up ample classroom time.  I already have too many things in my mind that I want to teach my students, and I consider this content to be much more important than grammar instruction after reading about all of these case studies denouncing its effectiveness.  I know that I learned my 'grammar 1' from all of the reading and writing I did as a child, and I want to help my students pick it up the same way.  An idea I have for possible instruction technique is to include the recognition of grammar errors in students' work, but not grading it.  This might be a way I could point out some of the formal rules but in a way that is not so confusing and rote.  I could have them correct their errors for a homework assignment so they get some practice in correcting at least some more widely used and accepted rules of formal grammar.