These slides can be used to teach economic interdependency and specialization. This file includes great visual representations of these concepts, which can be challenging for some students.
This power point presentation has 3 slides and can be used as a whole group or small group lesson. I have my students to work with a buddy or in small groups to encourage collaborative discussions, critical thinking and problem solving. It also gives insight into students' ability to compose their thoughts coherently.
I recommend teaching mini-lessons for each concept. It's best to teach interdependency and specialization on different days to maximize student learning.