We’ve all watched the scene in teen movies: a terrified student has to present in front of the class. The student freezes or panics. The class erupts into jeers and laughter. Fortunately, students in ...

I stood at the side of a large stage, unseen by the audience and waiting for my cue. The event emcee was introducing me in Spanish at the podium. Across the stage, hidden in the wings, I could see a ...