An FIR was registered against Rajni Upadhyay on charges of culpable homicide and voluntarily causing hurt, Superintendent of Police Anil Kumar said.
The family members of the girl, who was a student of class five in the school in Rasda area, alleged that the teacher slapped her on February 5 due to which she fainted.
She was later admitted to the hospital where she died today, they said.
They also staged a protest outside the school today with the body of the girl, demanding action against the teacher.
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