More than 80 percent of the earth's surface originated from volcanoes. The 16th lesson in a 20-part series introduces the shape and development of volcanoes. It begins with a demonstration using a balloon and flour to illustrate the...

Equip learners with safety knowledge in the case of an earthquake. After coloring the places to go to get help after a quake, and label places that wouldn't be safe to go after a quake, young geologists simulate three levels of...

Learners discover hazards related to volcanoes and predict the effects these hazards have on people and land. As blossoming geologists explore various volcanic eruptions, including the hazards associated with them, they...

Study and compare multiple aspects of both Aztec and Inca civilizations. Young historians explain how each of the empires came to be, and how they were both defeated by the Spanish. The resource starts out as a good lesson, but is...