Check out these videos on plate tectonics - very useful for revision if you like watching things and to re-cap what we've learnt in the first few plate tectonics lessons:
Structure of the earth: http://museumvictoria.com.au/melbournemuseum/discoverycentre/dynamic-earth/videos/earths-internal-structure/
Explosive vs Effusive Eruptions http://museumvictoria.com.au/melbournemuseum/discoverycentre/dynamic-earth/videos/eruption-of-different-types-of-volcano/
Volcanic Eruptions and Human Life: http://museumvictoria.com.au/melbournemuseum/discoverycentre/dynamic-earth/videos/volcanic-eruptions-and-human-life/
There are also other videos relevant to plate tectonics, which can be found down the left hand side of the page.