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.
Scientific Practices and Computational Thinking in Modeling & Simulation This document is a handout used to reflect on the scientific practices and computational thinking involved in a Project GUTS module or lesson.