THE EFFECTIVENESS OF THINK TALK WRITE LEARNING MODEL IN IMPROVING STUDENTS' MATHEMATICAL COMMUNICATION SKILLS AT MTs AL JAMI'YATUL WASHLIYAH TEMBUNG

This study aimed to determine whether the mathematical communication skills of students using Think Talk Write model is better than students using conventional learning methods and whether the use of Think Talk Write Learning Model is effective to improve students' mathematical communication skills. The population was students of grade VIII. The sample of the experimental class was class VIII-4 consisting of 35 students and control class was class VIII-5 consisting of 35 students. The type of research used in this study was quasi experiment. The results of the study found in the experimental class after the Think Talk Write model was applied is that the average grade of students increased from 34.14 on pretest to 84.71 on post-test or increased by 50.57. While in the control class, students' mathematical communication skills increased by 44, from 26.71 on pretest to 70.71 on post-test. Based on the results of hypothesis test calculation, it was obtained tcount = 5.259. Furthermore, tcount results were compared with ttable with significant level ? = 0.05, then it was obtained ttable = 2.052. Thus it can be said tcount> ttable that is 5.259> 2.052. Then Ha was accepted with a hypothesis stating that the use of Think Talk Write Model is effective in improving students mathematical communication skills.