Like they expected her to have an outburst when she knew she was being observed? What dummies these people are. I'm sure this wasn't the first time she's spoken that way to a student. It's just the first time she was caught on a recording doing it. They can try to modify her classroom behavior any way they want, but 10 to 1, she'll repeat this type of outburst at some point in the future, and hopefully another student will capture it.