Arizona's College and Career Ready Standards
SS03-S4C4. Human Systems: Human cultures, their nature, and distribution affect societies and the Earth.
SS03-S4C4-01. Describe changes over time in transportation (e.g., animal, boat, train, motorized vehicle, aircraft).
SS03-S5C1. Foundations of Economics: The foundations of economics are the application of basic economic concepts and decision-making skills. This includes scarcity and the different methods of allocation of goods and services.
SS03-S5C1-04. Give examples of trade in the local community (e.g., farmers supply the grocer).