How have our needs and wants changed due to our economic needs changing over time? Objective Know: The differences between needs and wants. The differences and purposes for a variety of tools (1400-1800). Understand: Function of tools today in relation to 500 years ago. Be Able to Do: Students will identify tools during Ancestral Puebloan Era (1400-1800): 1- identification of tools, 2- what the tools were used for, 3- what materials they were made out of, 4- what purposes they served. Students will create their own thriving tool. Background Tools are important because they keep us alive. Witho Duration: 60 Minutes.