Middle-aged male teacher sacked after bizarre striptease in front of stunned class

But stripping off in front of a class of unruly pupils is not one of the recommended techniques.

The bizarre striptease was performed by a chubby supply teacher who threatened to punish misbehaving 13 and 14-year-olds by making them look at his body.

When the teenagers continued playing up, he stayed true to his word and pulled off his shirt.

Hysterics: The teacher struggles to put his shirt back on. His teenage pupils can be heard screaming with laughter on the YouTube video of the impromptu striptease.

The prank misfired, however, after a pupil at Sudbury Upper School and Arts College in Suffolk secretly filmed him with a mobile phone and forwarded the 53-second clip to other children.

Before the day was out the headteacher had seen the footage of the bearded, balding and bespectacled English teacher and ordered him to leave the 1,185-pupil school and never return.

Adding to the his embarrassment, the clip was later posted on video sharing website YouTube under the heading 'Teacher Strip'.

A message accompanying the footage, which has been viewed more than 800 times, reads: 'make sure your not eating when ur wachin this .'

The unidentified man's teaching career is now in doubt after Suffolk County Council banned him from working again at any of its 357 schools.

A pupil at the mixed comprehensive said: 'Kids were playing up in class and his way of dealing with it was to tell everyone to be quiet or he would take his shirt off and show his man boobs.

'He was quite overweight and it was a sight that nobody really wanted to see. Everyone thought he was joking and people carried on messing around - but then he really did take his shirt off.

'It was quite shocking but pupils thought it was hilarious.'

Another added: 'It was hilarious. People were goading him saying "I bet you haven't got muscles". He told us all "I'll show you" and started taking off his shirt.

'We all thought he was pretending but he took his shirt off and started flexing his muscles. Then he said: "Look, I told you".

'He put his shirt back on but he was still buttoning it up when he was teaching. Everyone was killing themselves laughing.'

Will Theobald, 17, who posted the clip on YouTube, said: 'About a quarter of the students had the clip on their phone. Everyone called him Gimli after the character in Lord of the Rings.

'I don't know what he was thinking. You can't do stuff like that and get away with it.'

During the strip, pupils can be heard laughing, cheering and screaming. One girl shouts out "Oh my god!" followed by "Bless him".

The teacher was hired for the day from UK Teaching Agency in Radlett, Hertfordshire. No one from the company was available to comment yesterday.

A Suffolk County Council spokesman said: 'It was not planned or part of a lesson. It was just his reaction to a behaviour situation.

'As soon as the headteacher was made aware of the incident, the supply teacher in question was asked to leave the school premises immediately.

'The matter was also reported immediately to the supply agency employing him as well as the council.

'He will not be allowed to teach in Suffolk again. I don't know whether there will be any more professional disciplinary action against him.'

The spokesman added: 'The protocol and vetting of teachers who work for these agencies is controlled by the Department for Children, Schools and Families.

'Schools should be confident and expect that people who are supplied are of the required standard.'

An Ofsted report last month concluded teaching standards at the school were 'satisfactory'.

It added: 'Most behave well but there are occasions, especially in lessons where there is inconsistency in the quality of teaching and management of behaviour, when some students are not engaged in learning.'

Headteacher David Forrest yesterday said the teacher had not taught at the school before the incident two months ago.

He refused to name him, adding: 'Disciplinary matters are private between the school, the man concerned and his employer.'