Although there are numerous challenges for implementing a comprehensive K-12 computer science curriculum in the United States, the need is obvious, and the time to begin is now. Computer science is a well-established academic discipline at the collegiate and postgraduate levels, as well as a distinct and important profession in the world economy.…

Standard methods of teaching an introductory course in computer science, designed to introduce computer programming as a tool for mathematicians and engineers at the university level, are unnecessarily complicated and difficult. They lack a common thread that unifies each unit of material and frequently make use of mathematical notation, technical…