Introduction to plate tectonics theory presents plate tectonics using a set of block models redrawn from the National Geographic Society's Making of a Continent map, published in 1986. Plate tectonics models published by the USGS are also included for presenting key basic concepts used to explain why ocean basins and continents shift around the globe. The slide show contains audio text, and is part of a four part series which presents global tectonic evolution of the ocean basins and continents.