Andrew Kern has written a great post on When and How to Teach Grammar. I love it when people write what I think, because I can't write so well. I especially love these quotes from the article:
"We must not think about grammar as an academic study. Life is not for school; school is for life. We should always teach grammar for the simple reason that we always do teach grammar."
"If you are speaking to another person, you are helping form the pattern of that person’s thinking. You are contributing to his vocabulary (maybe that’s more obvious), and you are also contributing to the structure of his thought.
If you constantly speak to your two or three year old child in one and two word sentences, that is how your child will tend to think. And that’s more or less OK with a one year old, less so with a two year old, and horrible with a three year old."
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