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By The Drum Team, Editorial

March 22, 2011 | 2 min read

A Bristol student has left The Training and Development Agency (TDA) for Schools red-faced after he pointed out that an equation shown on the organisation’s recent television advert was incorrect.

Year 10 student, Chris Coombes, who attends John Cabot Academy in Bristol, wrote to his local paper when he spotted the ironic error.

The advert, which aims to attract new people to teaching, shows a teacher writing the equation (g²)⁷=gâ–« on the whiteboard; she is later shown writing g7xg² beneath, implying to the viewer that this would be the solution to the equation.

However, as Coombes points out in his letter to the Evening Post, the solution to the equation is inaccurate.

“Our TV adverts use highly-qualified teachers with their real-life classes," said TDA representative, Simon Nutt, speaking to the Evening Post today.

"We make every effort to capture the spirit of the lesson in the final footage but there are inevitably some scenes that have to be cut down or cut together which may mean that we cannot show the full details of a question, answer or comment."

Coombes, whose ambition is to pursue a career in maths, was praised for his keen observation by his head teacher.