PENGEMBANGAN BAHAN AJAR TEKS DISKUSI BERBASIS PENEMUAN PADA SISWA KELAS VIII SMP NEGERI 4 MEDAN

This study aims to find out about the results of the development of discussion textual writing teaching material based on the finding in the seventh grade students of SMP Negeri 4 Medan. The research method used is research and development research and development (R & D) proposed by Vienna Sanjaya refers to Borg & Gall model. The trial subjects consisted of 3 students with individual trials, 9 students with small group trials, and 32 students with limited field trials. Technique of data collection used observation, interviews, questionnaires, and test of writing text. The results showed that: (1) material expert validation includes content feasibility with an average of 89.84% on very good criteria, presentation feasibility with an average of 88.46% on very good criteria, and language assessment with an average of 90.38% on very good criteria, (2) validation of design experts with an average of 92.08% on very good criteria, (3) teacher response with an average of 89.17% on very good criteria, (4) individual testing with an average of 76.39% on good criteria, (5) small group trials with an average of 81.94% on very good criteria, and (6) limited field tests with an average of 92.77% on very good criteria. The result of discussion textual writing test before using the module is 70,87%, while the result of the test of writing discussion text of the student after using the module increased by 80,09%. The difference is 9.22%. from before to after using
the module. This proves that teaching materials to write discussion texts developed can
improve student learning outcomes by using discovery-based learning. This research has implications for students, which can more easily develop ideas or ideas from information sources that are integrated with the surrounding environment. Indonesian Language Teachers also provide a good response to teaching materials that use modules that can be used as a companion of the main teaching materials at school. The modules that have been developed can be inputs and assessments in a curriculum-oriented development that can contribute to educational institutions to improve the quality of learning