A teacher posed as a sexually abused pupil and phoned Childline to accuse a colleague of being a paedophile.
Sheena Boll, 35, claimed she was a 14-year-old girl who had been abused by a male teacher who worked with special needs youngsters at the school in Newham.
She claimed she was a vulnerable teenager and had been sexually assaulted by the teacher who was taking such a close, personal interest in her that she was afraid to go to school.
After the call in March 2016 police launched an investigation .
During the enquiry other staff at the school praised the accused teacher for the "positive and effective manner he interacted with his students."
Boll was arrested three months later and admitted she had made the calls herself.
It emerged that Boll had a history over the past decade of making formal complaints to police against employees of organisations and businesses.
Many were later withdrawn after she told officers she had resolved the disputes privately.
In an impact state read to Thames Magistrate Court the victim, who still works at the school, said:
Last week Boll, of Woodstock Road, Forest Gate, East London admitted malicious communication and was sentenced to 11 weeks prison suspended for two years.
She was tagged and given an overnight curfew for a month as well as a 12 month supervision order.
Boll was also given 200 hours community service and ordered to pay costs and compensation to her victim.