There are two important messages here - the obvious one being given in the title. The second is hidden in this statement: "By remaining silent, teachers do more than simply miss a teachable moment. " I love that - a teachable moment, he idea that school is truly for learning, about all subjects, and that teachers and students must have an eye towards how to make every lesson as meaningful as possible. To have the most teachable moments, it does take two - both teachers who want to teach and students who want to learn. To the author, I send a thank you for giving me hope in our future. This is the most uplifting reporting I have read in recent days.