During the first week of class, the instructor in this course asked students to draw a concept map to illustrate their understanding of ''free trade'' to illustrate what he meant by a concept map,he used the overhead projector to show the class an example he had drawn a concept map of his understanding of the gross national product (GNP) to assess students' responses, he drew his own concept map on ''free trade'' and extracted a list of critical related concepts to look for in their maps.