A teacher at a BASIS charter school shamed a black student by teaching a lesson about the civil rights movement by inviting the class to isolate him.

BASIS is known for its high test scores and its exclusionary practices.

“A Phoenix mother says her 9-year-old son was forced to walk through his class as his teacher and fellow students yelled at, humiliated and berated him during a lesson on school segregation.

“Claudia Rodriguez posted on Facebook that a third-grade teacher at BASIS Phoenix Central singled out her son, who is black, as the class was learning about the civil-rights movement.

“The Head of School had the nerve to tell me that there was some educational value in this incident because it started conversations in the homes of the other kids,” Rodriguez wrote. “I felt the need to speak up so that no other child ever has to feel what my son felt.””