In my life I’ve been very lucky to travel around the world and see students and teachers in nearly two dozen countries—but the most awe-inspiring experience I’ve ever had was two years after 9/11 when I had the chance to attend a conference in Manhattan and personally meet many of the heroic teachers who persevered under conditions that in our worst nightmares we could never have imagined. In my opinion there’s not been nearly enough written about those teachers, and I hope that changes soon.