I don't know about business but she is definitely not a good math teacher.
For some reason she was my math teacher, and she was not a particularly good math teacher. Heavy reliance on lesson plans and videos. An alright teacher one on one, but only one on one. Willing to help students, but not very good at explaining concepts or giving straight answers.
Doesn't even know what she is talking about, also she is VERY monotone and she hardly ever interacts with the class