A church school teacher in Britain asked a class of 10-year-olds to write down the rudest words they know and classify them from ‘really upsetting’ to ‘harmless’, Daily Mail reported. The pupils came up with obscenities including crude slang for sex acts and words for male and female genitalia.

As part of an anti-bullying lesson, class teacher Fred Laband of Great and Little Shelford Church of England Primary in Great Shelford asked pupils to write a list of hurtful words commonly levelled at the victims of bullying and classify them accordingly in four groups, the daily said.

Parents were horrified when their children returned home with exercise books littered with expletives — and asked what the words meant.

Many of the terms were displayed on a board in front of the class. The class teacher Laband was teaching anti-bullying as part of the Government’s Social and Emotional Aspects of Learning Programme, the report said.

Nicknamed lessons in ‘happiness, they aim to improve children’s well-being and reduce disruptive behaviour. The teacher asked pupils at the high-achieving primary to categorise the insults under four headings. The headings were grouped under ‘really upsetting’, ‘upsetting’, ‘not nice’, and ‘harmless’. A group included some of the most obscene words in the English language, which are too offensive to be published.

A mother said: “When my 10-year-old showed me an exercise book... I was disgusted.”

In a letter to parents, headmistress Alison Evans said: “On reflection, it has been agreed that it was inappropriate to record these words in writing and the pages have been removed from exercise books.”