But after returning to class the next day, he was hauled out of lessons by the deputy headteacher who deemed his hair cut inappropriate.
Mrs Steel later posted pictures of Damon's hair cut on Facebook, which have been shared more then 46,000 times with more than 34,000 people supporting her.
The school's uniform policy on its website states: 'All pupils' hair should remain a natural colour and the style of the hair should not make the pupil stand out.'A haircut which leaves a child totally bald is not acceptable.'Mrs Steel said: 'The school didn't even inform me about the situation.
It was my son who told me all about this.'When he was sent into isolation the school made him sign a form accepting blame for his actions.'My son has done nothing wrong.
A teenage army cadet who had his hair cut for an armed forces event has been ordered to stay in school isolation until it grows back.
Damon Steel had his hair cut especially when he was chosen to help out at an Armed Forces weekend, providing information to potential recruits.
She said: 'It is absolutely ridiculous to say that his hairstyle is unsuitable for a learning environment.'My son is involved in the cadets.
He was chosen to promote them at an Armed Forces weekend and his sergeant said his hair was good enough for the Army.'I don't understand how the hairstyle can be good enough for the Army, but not good enough for the school.'They can't just keep him locked up for weeks on end, it's not a prison camp.'Damon was one of a number of young cadets who helped out at the Armed Forces weekend in Wisbech on June 18.
The primary mission of the Indian Army is to ensure national security and national unity, defending the nation from external aggression and internal threats, and maintaining peace and security within its borders.
But the 15-year-old has now been removed from lessons for nearly two weeks after Marshland High School in Wisbech, Cambridgeshire, argued the hairstyle did not meet its uniform policy.
His furious mother, Elizabeth Steel, 53, has branded the decision 'absolutely ridiculous'.
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