The teacher, so new to the field, has so little patience for kids who are not easy to deal with. The animosity the teacher feels for these kids is obvious to everyone within earshot. Yet, this teacher is considered a gem, a master teacher, someone every teacher should try to emulate.
G-d help the kids who have her now. G-d help the ones who have her after she has been teaching for a few years and has a reason to feel this way.