The next time you assign a writing project, show your teen that you’re a good sport by writing your own composition. Then ask him to evaluate your writing. This will give your teen practice in editing as he searches for grammatical or punctuation mistakes. You can also suggest he gives you ideas as to how you can improve your paper. These activities will help him to focus his attention on the details of your composition, and also put these same efforts into gaining a better understanding of how to improve his paper.