Other
Nevada Seismological Laboratory: Plate Tectonics, the Cause of Earthquakes
This site contains an in-depth explanation of the causes of earthquakes as they relate to plate tectonics, and also has many nice and easy to read pictures, maps, and diagrams of plate tectonics and earthquakes.
Other
Plate Tectonic Theory [Pdf]
Check out this slideshow on Plate Tectonics-The unifying theory for all other theories in the Earth sciences-Has resulted in a more detailed understanding of Earth history-Has enabled geologists to more precisely(and cheaply) discover...
University of California
Ucmp: Plate Tectonics
Provides hyperlinks to the history behind and the mechanisms driving plate tectonics. Be sure to click on the globe icons for animations of plate tectonics.
Curated OER
Extreme Science: A Lesson in Plate Tectonics
With its clickable map, this site provides text and graphics on spreading boundary, converging boundary, subduction zone, transverse boundaries and faults.