When Stevie Lim, 30, started singing “Head, Shoulders, Knees and Toes” with gestures, the first-graders at Minami Elementary School in Sayama, Saitama Prefecture, started singing together and mimicking his movements.

Source: http://www.japantimes.co.jp/news/2014/01/02/national/schools-fret-about-assistant-teachers-ahead-of-proposed-2020-reforms/#.VEXZRKzLc2B