Volcano World is an educational outreach project of the North Dakota and Oregon Space Grant Consortia.
This online booklet, published by the U.S. Geological Survey, is an outstanding introduction to the geology of volcanos.
This website is an educational resource that describes the science behind volcanoes and volcanic processes.
These five hands-on volcano activities for the classroom were created by teachers and librarians during a summer workshop
Explore how volcanoes are formed, why they erupt, and how scientists are getting better at spotting the warning signs of an impending eruption. Be sure to watch the video clips scattered throughout the site.
Volcanoes provide stark evidence that Earth is a dynamic planet.
The Nature of Volcanoes | Principal Types of Volcanoes
http://vulcan.wr.usgs.gov/Volcanoes/