1. 12.1 – Evidence for Continental Drift – You Tube
2. 12.2 – Features of Plate Tectonics – Part 1 – You Tube
3. 12.2 – Features of Plate Tectonics (Earthquakes and Volcanoes) – Part 2 – YouTube
For interest:
Mount St. Helens Story (20 minutes. Vintage. Lots of detail and footage.)
Mt. St. Helens 30th Anniversary Documentary (40 minutes. Not vintage. Also talks about what happened after. Shows SUCCESSION.)