THE DEVELOPMENT OF TEACHING MATERIAL TO WRITE EXPLANATION TEXT BASED ON MIND MAP

Teaching materials is a set of systematically arranged material to help students in the learning process. One form of teaching materials is a module which is a type of printed material. This study aims to determine the results of the development of teaching materials to write explanation text based on mind map in students of class XI SMA Negeri 5 Medan. The trial subjects consisted of 3 students with individual trials, 9 students with small group trials, and 32 students with limited field trials. Data collection techniques used observation, interviews, questionnaires and test of writing explanation text. The results showed that validation of the material experts included the feasibility of the content with an average of 84.37% on very good criteria, the feasibility of the presentation with an average of 83.65% on very good criteria, and the language aspect with an average of 88 , 46% in very good criteria; validation of design experts with an average of 86.25% on the criteria very good; teachers response with an average of 86.76% on the criteria very good; test a individual with an average of 77.08% on good criteria; a trial to a small group with an average of 80.09% on the criteria very good; and a limited field test with an average of 85.22% on the criteria very good. The learning result student test write explanation text before use modules of 75.15 while the result write explanation text after using the module students increased by 85. The difference obtained by 9.85 from before to after.