What is the definition of Disciplinary Weapon?

A 'disciplinary weapon' is like a supercharged, punitive version of a teacher's favorite tool - the spanking stick. But instead of just hitting the nose, it's designed to send a student's confidence into a panic, like a superhero's cape on a bad day. Here's an unsettling example sentence: "The disciplinary weapon of choice for the 'Overachieving' student was a stern lecture delivered in a dramatic, exaggerated 'I'm sorry' voice, accompanied by a meticulously organized 'failure chart.'"