This short video (3:13 minutes) introduces complex adaptive systems and agent-based modeling concepts to middle-school students. It shows beautiful footage of birds flocking as an example of a complex adaptive system.
This link will take you to the playlist for the Project GUTS/CS in Science youtube channel, where videos for each module and for teaching and StarLogo Nova tips are organized.
This is an example of how a computer modeler uses various aspect of computational thinking while designing, creating and using a computer model as a tool to think with.
In this video, GUTS teachers talk about instilling dispositions and classroom culture that supports scientific inquiry and the development of computational thinking.