Prosecutors said she lost her temper before lashing out with the stationary and also claimed she called the boy a “muppet”.
The court was told a teaching assistant watched in horror as part of the ruler “flew across the room” after the attack on March 20, which left the Year 2 pupil “sad and scared”.
But Khan wept in the dock as she told the court she only “tapped” the boy on the head because he was misbehaving by poking another pupil with a pencil.
Outside court Khan, who looked visibly relieved as the not guilty verdcits were read out, spoke of her relief following her ordeal that saw her suspended from her job and taking antidepressants.
