Enchanted Learning
Enchanted Learning: Volcano
Definitions, facts, charts, activities, crafts, quizzes, and diagrams for teaching and learning about volcanoes.
US Geological Survey
U.s. Geological Survey: Quick Reference for Volcano Types
Succinct descriptions of the different kinds of volcanoes, with additional links for each.
University of Hawai'i
Ask an Earth Expert: What Are the Different Types of Volcanoes?
A concise explanation of the three types of volcanoes recognized by geologists.