This report describes the operation of a computer monitor called MYCROFT, a system which can debug elementary programs for drawing pictures. The basic skills which are fundamental to debugging skill (description, plan, linearity, insertions, global knowledge, and imperative semantics) are examined. These programs are written for LOGO turtles.…

A technique was developed to facilitate creating computer-based instruction (CBI) with a minimum of effort on the part of the author/coder, and the feasibility of using a structure which puts control of the lesson strategy into the hands of the student learner was investigated. A model which relieves the author of CBI strategy selection was…

With support from the National Science Foundation and the University of California, the Physics Computer Development Project have produced in the last six years computer based material in a wide variety of modes. Among the major products are science learning dialogs, graphic additions to APL (A Programming Language), the underlying software, and…