University of Hawai'i
The Hawai`i Space Grant Consortium: Volcanology Activity
There are 5 experiments with teacher and student pages. EXCELLENT hands on experiments. Young scholars can learn how lava flows, lava layering and viscosity.
US Geological Survey
Usgs: Volcanic Hazards, Features, and Phenomena
Site from the U.S. Geological Survey provides a brief list of volcano terminology including descriptions as well as links to major menus.