The document discusses why people trade goods and services and how money facilitates trade. It defines goods as possessions or personal property, services as work done for others, and exchange as giving up one thing for another. The document contains an image showing a little girl at a store who is likely going to buy a doll. It includes questions about the image and a link to a worksheet for students to complete with a partner on the topics of trade, goods, services, and how money makes exchanges easier.