The Smithsonian Institute and USGS have produced a map-based resource called This Dynamic Planet that can be used for a variety of teaching activities with elementary and middle-school students. A teacher's guide is also available that includes a Pangaea puzzle lesson for 6th grade.
NASA keeps tabs on volcanoes all around the earth. Visit this site to get updates on current volcanoes, animation for your instruction and lots more. Students may also enjoy learning about how NASA sends a robot into a volcano to explore.
The best interactives on volcanoes -- you will want to explore these!! Show your class how rocks melt, how volcanoes erupt, plate tectonics and so much more – from Annenberg.
PBS Learning Media has complete lesson plans on volcanoes that feature video clips, interactives, hands-on activities and maps. Designed for middle school students but can be easily adapted.
Check out these teacher resources that include amazing photos of volcanoes all over the world, with high-interest phenomena such as volcanic lightning, blue flame lava, and extra-terrestrial volcanoes. Classroom activities and lessons include Piles of Fire, Cake Batter Lava, and Gelatin Volcanoes.