This is the first lesson explaining how Employment Structures work. A copy of the presentation used in the video can be found with this link. https://docs.google.com/presentation/... It is part of the Industry and transport module for Common Entrance Geography and Key Stage 3. Primary Industry - Extracts raw materials from the ground. e.g. farmer Secondary Industry - Manufactures or makes raw materials into products. e.g builder Tertiary Industry - Sells or provides a service. e.g teacher Quaternary Industry - Works in Hi Tec research discovering new ideas and products.