http://www.makemegenius.com/science-videos/grade_4/earth–atmospheric-layers-&-structure
Plate Tectonics http://www.youtube.com/watch?v=OinfMLdornU
http://www.makemegenius.com/video_play.php?id=138
Learn and practice
http://www.learner.org/interactives/dynamicearth/index.html
http://www.learner.org/interactives/dynamicearth/plate.html
http://www.learner.org/interactives/dynamicearth/plate2.html
http://www.learner.org/interactives/dynamicearth/slip.html
Other interesting visual resources where you can find information
Earth 100 Million Years From Now video http://www.youtube.com/watch?v=uGcDed4xVD4
Short plate tectonics animation with explanation http://www.youtube.com/watch?v=6OHRb_ODo-Q
Plate tectonics video http://www.youtube.com/watch?v=ryrXAGY1dmE
Plate tectonics animation http://www.youtube.com/watch?v=ZLJLFYXp-0Q
All about Plate Tectonics http://www.enchantedlearning.com/subjects/astronomy/planets/earth/Continents.shtml
These videos are fantastics to learn english ver well. I think is a god job!!!