Initial experience with a computational thinking course for computer science students

Experience with the first offering of a computational thinking course for computer science (CT4CS) students is reported. The course is grounded in student interaction with fundamental, recurring concepts suggested by comparison with two sets of computer science principles. By using specialized, freely available tools and physical simulations it is possible to provide concrete, tangible learning experiences that neither require knowledge of nor the overhead of programming. Student end-of-term reflections indicate that the course deepened and broadened their understanding of computer science even when they had previously encountered a topic, and improved their computer science vocabulary.