Look at that student, so cool, earphones in, ignoring the world. But see those flying pencils and erasers? They’re determined to annoy her. Her bag spins around her—a shield. Hold to keep them circled, let go to send them flying, knocking the troublemakers away. But once the bag’s gone, she’s vulnerable until it returns. It’s a lesson in knowing when to defend and when to strike. How long can she keep her cool?