Cornell University's Discover Our Earth educational web pages provide interactive data analysis and mapping tools accompanied by data sets, images, graphs, maps, and movies. There are two mapping tools, QUEST and GEOID. QUEST has been designed and developed for high school and college students who are just beginning their study of earth science. It has an easy-to-use interface that allows access to several key earth science data sets. GEIOD is more appropriate for advanced users. It provides a dynamic mapping interface and can be used to access all of the earth science data sets made available by Cornell. Both tools create user-directed, GIS-based maps that can be useful in a wide range of earth science topics, such as plate tectonics, geophysics, sea level change and geography. In addition to the software tools, there are guided exercises, curriculum materials, and a teacher's guide.