Australian teacher Eddie Woo has won fans worldwide with his high-energy maths lessons, posted on YouTube.
Mr Woo recently won Australia's Local Hero award and was a finalist for the Global Teacher Prize.
He explains his infectious lesson strategies to the BBC in Sydney.
Video produced by Frances Mao and Tessa Wong.
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(Source: BBC News, https://www.youtube.com/watch?v=Qwj8UKaEoeY)
