The teacher, however, managed to overpower her.
Police said the sixth standard girl of the school at Chinnakadai area here had left school yesterday without informing her teacher, violatingrules which did not permit children go out in the afternoon for safety reasons.
Fearing that her teacher would reprimand her, she brought her mother with her to the school.
The enraged mother entered into a heated argument with her and asked her daughter to pounce on the teacher and stab her, police said.
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The teacher raised an alarm when the girl rushed towards her with the chisel and informed the Headmaster.
She also managed to overpower girl and informed police.
Police tried to take the girl to the police station, but released her after the mother raised a hue and cry.
Later a woman Inspector and woman Sub-Inspector questioned the duo, who alleged that the teacher was targetting them and they were being harassed frequently.
Today, the mother met the teacher and apologised to her for their behaviour and they parted on a conciliatory note, police said.
No case had been filed against the woman, they said.