Lizo Muzimbo of BBC TV's Newsround children's news programme was the celebrity guest at the TES Newsday awards on Monday.
Schools were given a day to compile newspapers and news websites in a test of presentation and writing skills that captured the imagination of thousands of children. More than 35,000 pupils took part this year.
The best feature article was written by Marina McIntyre, a sixth-former at St Paul's girls school, London, who interviewed the laddish star of the Naked Chef television series, for the school paper The Marble.
In the interview, Jamie Oliver told Marina abot when he cooked for Tony Blair and how "mindblowing" it was to be in a position to call the Prime Minister "mate".
The award for the best secondary-school newspaper, went to The Avian, produced by Manchester Grammar School.
The primary winner was Stubbins Evening Chronicle, published by Stubbins primary, near Ramsbottom, Lancashire.
The best health education poster was designed by Kayleigh Hepburn, 13, of Robert Gordon's college, Aberdeen, and the best news website was put together by Jade Wood and Claire March of Park Hall secondary in Castle Bromwich, Birmingham.
The awards ceremony was held in the Churchill Room of the House of Commons, where the children were guests of Labour MP John Gunnell.