This smartboard lesson is designed to introduce the concept of interdependence to 3rd graders. Most of the lesson introduces new economic vocabulary terms such as barter, trade, import, and export. Also, students are exposed to some of the various currencies around the world. This lesson correlates with the Georgia Performance Standards (GPS) for 3rd grade social studies. There are 10 slides, an essential question, an internet link, and a summarizing activity included with this lesson.