Developing a framework for computational thinking from a disciplinary perspective (2018) Proceedings of the International Conference on Computational Thinking Education 2018. Hong Kong: The Education University of Hong Kong.
Computational Thinking for Youth in Action (2011) This is an early paper of Computational Thinking that has a lot of traction. It's where we first describe the Use-Modify-Create trajectory.
What's Represented? These exercises ask the learner to identify abstractions in the computer model as compared to a diagram or image of a natural phenomenon.
My Robotic Friends (cups activity) This is the cups activity by Thinkersmith (later part of Code.org)
Daisy world A model demonstrating the albedo effect of black or white surfaces. Use as a part of the Climate Change and Agriculture Project GUTS Curricular Unit, or as a stand-alone model, activity, and video.