Mandawuy Djarrtjuntjun Yunupingu AC, formerly Tom Djambayang Bakamana Yunupingu; skin name Gudjuk; also known as Dr Yunupingu (17 September 1956 – 2 June 2013) was an Australian musician and educator. An Aboriginal, in 1989 he became assistant principal of the Yirrkala Community School – which he once attended – and was principal for the following two years. He helped establish the Yolngu Action Group and introduced the Both Ways system, which recognised traditional Aboriginal teaching alongside Western methods.