“I think she’s saying that they’re not smart enough to be teachers, but I’m not sure.”
This was not an assessment of the number of black teachers in education but an assessment of the number of black teachers in nine urban environments. Evidently, these black teachers are smart enough to know they don’t want to teach in urban areas.
You, Sir, go to the head of the class! You have just "aced" your evaluation of the situation.
Other correct answers include, "They don't want their own children condemned to the educational hell-hole in which they themselves work and they cannot afford private schools."
In my state, most of the school districts that have been taken over by the state due to mismanagement by the local school board are “urban environments.” One of the byproducts of state control is more rigorous testing of the students and closer oversight of the teachers.
Evidently, these black teachers are smart enough to know they don’t want to teach in urban areas.
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That would make them racist, if they were white.