When the position of high school principal opened up last year, we prompted a woman who has been with us for 25 years. We felt she was an excellent choice because she was unusually well-versed in the operations of the high school department. Moreover, she has always been a hardworking, efficient, and faithful teacher.
Since her promotion, she has become a completely changed woman. Her teachers complain that she yells at them and that she has become very sarcastic and mean. From the kindergarten principal and the elementary principal, I heard that she constantly complains about how much work she has. She keeps whining at them about this.
As the director of the school, what can I do ot help her?