Study guide: Products, Work, and Choices
Trace production and exchange while recognizing limited resources and different preferences.
Ideas to explain in your own words
- Distinguish a physical product from work performed for someone.
- Identify products and services in a supplied production chain.
- Identify a feasible choice and the next-best activity given up.
- Determine whether a proposed exchange matches both stated preferences.
Watch your reasoning
- Repairing the bicycle is work performed, so it is a service. The notebook, bread, and crayons are products, so they are goods in these examples.
- The story says Omi weaves the thread into cloth. Thread is the supplied material used in that step.
- The map game is feasible and second in the supplied preference order, so it is the next-best alternative.
- The two arrows transfer Una’s moon to Vic and Vic’s tree to Una. Those received cards match their stated preferences.
A worked review example
Sort Goods and Services: A pencil is a good because it is a physical product. Sharpening somebody’s pencil for them is a service because it describes work done for them. Trace a Product and the Work Behind It: “Cotton → thread → cloth → bag. Thread is Omi’s input; cloth is Omi’s output. Weaving is work, while the cloth is a good. Carrying the bag is the courier’s service.” Choose When Time Is Limited: “All three fit. Kai chooses the 20-minute puppet show. The next-best choice Kai gives up is the 20-minute map game, because it ranks above drawing.” Check a Pretend Exchange Agreement: “Una would receive tree, which Una prefers. Vic would receive moon, which Vic prefers. The described exchange matches both preferences if both freely agree; no real cards are needed.”
Make a practice plan
- Try the supplied lesson problems without looking at the answers.
- Compare your method with the worked examples and explain any correction.
- Use the new review cases, then complete the transfer task on paper or in your own document.