A headmistress was accused of being "excessive" in her response when pupils were unwilling to pose for a school photograph - by inviting a police officer to reprimand them.
Ann Hughes, who was head of Ysgol Goronwy Owen, a village primary school at Benllech, Anglesey, faces a catalogue of complaints at a hearing of the Professional Conduct Committee of the General Teaching Council for Wales.
The list of accusations against her included that she failed to investigate bullying, shouted excessively, highlighted parents' complaints during assembly potentially identifying pupils, engaged in unnecessary open criticism of children's mistakes, and imposed excessive punishment.
Mrs Hughes failed to create a cooperative working relationship among staff at the school, the GTCW was also told at Ewloe. The hearing is scheduled to last until Friday.
Mrs Hughes was suspended in 2011 and later dismissed.
The school was engulfed in crisis that year when five of the six teachers called in sick on the same day after earlier threatening industrial action following a declaration of no confidence in Mrs Hughes, claiming there was a "climate of fear."
A teacher has been struck off for life for inviting schoolboys to his home to play cards then turning it into bondage games. French master Glyn Bevan, 55, asked the boys for card games - but then plied them with drinks to get them to tie him up.
A disciplinary hearing in Cardiff was told Mr Bevan kept gaffer tape and ropes hidden behind the settee at his home for his bondage "fetish".
The bachelor schoolmaster befriended teenage boy pupils during the mid 1990s at Risca Comprehensive school in Newport.
A disciplinary hearing of the General Teaching Council for Wales heard officers found dozens of framed polaroid photographs of Mr Bevan and the boys trussed up with rope and tape. Detectives identified 29 boys in the photographs and traced all but three of them.
One of his victims, identified as Pupil A, told police how he was indecently assaulted at Mr Bevan's home in the village of Rogerstone, near Newport.
Mr Bevan, who did not attend the hearing in Cardiff, resigned from the 500-pupil school in October last year. The disciplinary panel found him guilty of unacceptable professional conduct between September 1991 and December 2000.