Understanding Student Answers In Introductory Physics Courses

摘要

Many assigned problems in introductory physics courses require the student to formulate a system of algebraic equations that describe a physical situation. An Intelligent Tutoring System (ITS) designed to help must be able to identify which physical quantity each student variable represents, and which fundamental laws each of her equations incorporates. Many ITS's predefine the variables ([4,2]) or require the student to explicitly and precisely specify what each one represents (e. g. ANDES[3]). Our earlier work [1] relaxed this constraint for problems without explicit numerical constants. This paper describes how the technique has been extended to cover problems with numerical constants.