This volcanoes site provides information about volcanoes as well as a classroom activity. There are video clips which show some of the features discussed, such as types of lava and eruptive styles. Topics covered by the text include how rocks melt, where and why volcanoes occur (plate tectonics), hot spots, volcanic hazards, forecasting eruptions and coping with risk. The classroom exercise involves deciding whether or not to build developments near volcanic features. Students are provided with maps, geologic data and helpful hints. Once the decision is made, students must defend their decisions at a press conference, complete with reporter's questions and a printout of the resulting news stories. This exercise illustrates the connection between science and public policy.