The Effect Of Using Concept Map s On Achieving English Grammar ...

students) mapping concepts prior to, during, and subsequent to instructionled to greater achievement as measured by postt est scores.Willerman and Harg (2006 )The objective of this study was to determine if a concept map used as anadvance organizer can improve the science achievement of eighth -gradestudents. Eighty-two eighth-grade students in four science classesparticipated in this study. The experimental group completed the conceptmap at the beginning of the science unit under the teacher's supervision. Atthe end of the two-week unit a science test was administered to theexperimental and the control group. The results of a one-tailed t testindicated that there was a significant difference between the two groups.The effect size is 0.40. It appears that the concept map can provide theclassroom teachers with a meaningful and practical structured approach forusing advance organizers in their classes.Rice and et . al (1998 )In the study, a method of scoring concept maps was developed to assessknowledge and comprehension levels of science achievement. By linkingscoring of concept maps to instructional obj ectives, scores were based uponthe correctness of propositions. High correlations between the concept mapscores and unit multiple choice tests provided strong evidence of thecontent validity of the map scores. Similarly, correlations between map73