Development Of GOSI Learning Media To Improve Learning Interest And Achievement Of 8th Grade Junior High School Students

Student interest and achievement in mathematics at the junior high school level are still not optimal, with low KKTP (National Competency-Based Curriculum) attainment. This is due to a lack of learning media that is interesting, easy to use, and relevant to the learning styles of students. In addition, classroom learning is still one-way and lacks interactivity. This study was conducted to address the low interest and achievement of students in mathematics. Through the ADDIE research and development model, GOSI (Google Site Berdiferensiasi) learning media was developed and measured for its validity, practicality, and effectiveness in increasing the interest and learning achievement of eighth-grade junior high school students. This study used LORI, UEQ, learning interest questionnaires, and mathematics achievement tests that were developed. The data were analyzed using descriptive statistics, with the effectiveness of the GOSI media measured using the N-Gain Score. The results showed that the GOSI media was valid according to media experts, subject matter experts, and learning experts. Based on joint testing with students and teachers, the GOSI learning media was considered practical, with above-average scores in every aspect of the UEQ. The results of the effectiveness test using the N-Gain Score showed that the GOSI learning media was effective in increasing the interest and achievement of eighth-grade junior high school students in mathematics, with a moderate average increase. Further research could explore the use of a differentiated learning approach in learning media to produce learning media that is relevant to the characteristics and needs of students in other subjects