The International Earth Science Olympiad (IESO) is an annual earth science competition for secondary school students. IESO has been founded as one of the major activities of the International Geoscience Education Organization (IGEO). In accordance with its statute, IESO is intended to raise student interest in and public awareness of earth science, as well as to enhance earth science learning of students. IESO is also developed in pursuit of encouraging friendly relationships among young learners from different countries and promoting international cooperation in exchanging ideas and materials about earth science and earth science education.
IESO has been conducted since 2007 which took place in Korea, whereas the 2nd IESO in Philippine (2008) and the 3rd IESO in Taiwan (2009). Indonesia as one of the countries which actively participates in IESO is cordially elected as the host of 4th IESO in 2010.