I say good for her. My father is a high school teacher, and it's unbelievably annoying to have kids and parents calling us at home several times per week. The following can be generalized for most teachers, but to give you some real-life examples: He is required to be up at school from 7 until 4, but he often stays later, going to his student's football/baseball/etc games at their request. Students and parents also are encouraged frequently by the administrators to set up parent-teacher conferences through the office. He also has help class at least once a week. They have ample opportunity to speak with him at school. Students need to remember that most faculty also have families who have absolutely nothing to do with their "grievances", and by their calling at home, they're taking away from our family time.