The major portion of this paper is devoted to delineate the types of errors made by Arab learners of English in the area of the article system. By so doing, the paper classifies learners' errors according to the Surface Structure Taxonomies of errors, and illustrates the possible sources of these errors. In order to overcome learners' difficulties…

Discussion of differences between problem-solving techniques of novices and experts suggests that both the experts' mental model and common novice problems can be derived from analyses of several expert and novice protocols. Three instructional strategies based on these differences are discussed, including the use of a computer simulation to solve…