Khan Academy
Khan Academy: Plate Tectonics: Evidence of Plate Movement
A detailed discussion of plate tectonics, and the evidence of plate movement that can be found to support plate tectonic theories. [13:18]
Khan Academy
Khan Academy: Plate Tectonics: Plates Moving Due to Convection in Mantle
A video lecture exploring how the plates in Earth's mantle move due to convection. [6:03]