You lost your cool and barked at your class—or at a certain student. You had a weak moment and took matters into your own hands instead of following your classroom management plan. And now you’re beating yourself up for it. You’re convinced that you’ve ruined everything, that you’ve undone all the influence, trust, and goodwill you’ve built up since the start of the year. That your students will never look at you the same way again. It’s a terrible feeling.…