If teachers do not read essays, parents may need to critique writing, as discussed in this essay. But most parents are not English teachers, as the author's mother was.

http://opinionator.blogs.nytimes.com/2014/05/05/the-perfect-essay/
The Perfect Essay
By JOHN KAAG
New York Times
MAY 5, 2014

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My mother said she would help me with my writing, but first I had to help myself. For each assignment, I was to write the best essay I could. Real criticism isn’t meant to find obvious mistakes, so if she found any — the type I could have found on my own — I had to start from scratch. From scratch. Once the essay was “flawless,” she would take an evening to walk me through my errors. That was when true criticism, the type that changed me as a person, began.

She chided me as a pseudo-sophisticate when I included obscure references and professional jargon. She had no patience for brilliant but useless extended metaphors. “Writers can’t bluff their way through ignorance.” That was news to me — I’d need to find another way to structure my daily existence. She trimmed back my flowery language, drew lines through my exclamation marks and argued for the value of understatement. “John,” she almost whispered. I leaned in to hear her: “I can’t hear you when you shout at me.” So I stopped shouting and bluffing, and slowly my writing improved.

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