The head teacher of Trinity School in Carlisle, Alan Mottershead, said Josh Thomas had made a good, warm impression at the school.
Mr Mottershead said:
"He was a good lad and got on well with everybody."
Josh moved to Cumbria from South Wales in September 2010 when he was 15 and stayed for one year to take his GCSEs.
Mr Mottershead said Josh had always said that he wanted to join the Army.
More top news
Over a hundred youngsters in Coniston were let out of lessons today to join their school's long tradition of an annual fell race.
A campaign has been launched to push for the restoration of the historic Union Chain Bridge.
Rain overnight. Brighter but cooler Friday. Windy weekend