Sometimes the hardest part of being a teacher is figuring out what your students DON’T know. It’s relatively easy to teach a subject to an entire group when you’re following a prescribed curriculum. The problem comes when the teacher doesn’t realize everyone is learning at a different rate or figuring out what some students may already know. Maybe the needed skill is empathy – knowing when students are lost/misdirected – and to foster less resistance to ask questions.
Students also have to realize that sometimes teachers don’t know absolutely everything. Just because they’re not understanding something doesn’t mean they’re stupid – the teacher may have simply missed some details you’re not aware of.