My Year 9 group will need to be having a look at the Volcano World website as part of their homework this week:
Well worth a look for everyone else as well though - information about volcanoes all over the world, details of current volcanic activity, photos, virtual volcano tours, games, etc.
Year 9 might also like to have a look at the website of the Montserrat Volcanic Observatory where there is detail of current volcanic activity on Montserrat, lots of excellent photos, and details of the new Hazard Level System.