"Ahu" are stone platforms on which many moai sit. There are 313 known ahu and 125 of these carry moai. The biggest, Ahu Tongariki is 220 m (720 ft), and had the most (15) and tallest moai.
A hallmark of the Latino community is to help one another, if students are interested in a way to give back and help their communities, becoming a teacher is probably one of the very best ways of doing that.