The report into how a paedophile teacher was able to film himself abusing five of his female pupils, some as young as six, will be sent to every school in England, it has been announced.
Nigel Leat was jailed indefinitely after he admitted 36 offences, including attempted rape of a child and sexual assault on children. At the time of the investigation, police also found more than 30,000 indecent photographs on memory sticks.
Children's minister Tim Loughton has ordered the review to be England schools in the hope others can learn from past mistakes.
Fellow teachers at Hillside First School in Weston-super-Mare, Somerset, reported Leat's shocking behaviour several times but senior managers failed to act.
The primary school's own management report notes at least 30 incidents of Leat's "inappropriate or unprofessional conduct" - but only 11 were recorded formally within the school.
These included Leat taking photographs of pupils on his mobile phone, of kissing and cuddling them and even having an erection while sitting on cushions in the library with one pupil.
After raising concerns about Leat's behaviour, one teacher was told she "should not accuse him of things".
Leat, who was deemed by a judge as a paedophile of the "most sickening order", had his "favourites" and the girls he picked were frequently less academically able, emotionally needy, vulnerable or pretty.
A serious case review, published in January, heavily criticised senior staff at the school for not acting on the warnings. Staff were "sufficiently concerned" about Leat's behaviour to ensure that his favourites were moved to other classes, yet the teacher continued to work at the primary school for 15 years.
Now, the report into the case, described by local MP John Penrose as "every parent's worst nightmare", will be distributed to every Local Safeguarding Children Board in England.
Leat, a married father of two, was jailed Bristol Crown Court last May.