Mellani Awalia Ahsan Hashrin, Latifah Mustofa Lestyanto
Based on a preliminary study at one of the state high schools in Blitar Regency, teaching materials in schools are limited to printed textbooks that have not been equipped with material explanations in the form of audio or audio-visual that is interactive, so they are still unable to facilitate students optimally. Students have difficulty understanding difficult concepts and materials, so most students score below the Minimum Completion Criteria. Thus, this development research is carried out with the aim of producing valid, practical, and effective interactive teaching materials to understand students' mathematical concepts in trigonometric ratio material. This research uses the ADDIE (Analysis, Design, Development, Implementation or Delivery and Evaluation) research model. The subjects of this study were class X MIPA 4 students of SMA Negeri 1 Kesamben, Blitar, totaling 35 students. The research data was obtained through validation sheets by expert lecturers and teachers, questionnaires of teacher and student responses, and also test questions for students. The interactive teaching materials developed in this study were declared valid, practical, and effective with an average validity score of 3.94; an average practicality score of 4.18; and an effectiveness percentage of 71.43%. So that the teaching materials can be applied to help understand students' mathematical concepts in learning activities in the classroom on the subject matter of trigonometric ratios. © 2024 Author(s).
Mathematics Education, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang Jalan, Semarang 5, Malang, 65145, Indonesia
