Some classroom management “experts” recommend standing close to difficult students during lessons. But moving into someone’s personal space without permission is a show of dominance. It’s aggressive and antagonistic and is universally perceived as a threat. And although it may dissuade unwanted behavior during the brief moment you’re standing there, doing so will give you less leverage and influence in the long run, resulting in more disruptive behavior. Allow students their personal space. They’ll appreciate and respect you for it.