Tharisth Natasyavira Izza Arzety, Hanan Zaki Alhusni, Dimas Fahmi Rizaldi, Refina Nuryanti, Sri Renata Mahardhika, Utama Alan Deta, Binar Kurnia Prahani, Titin Sunarti
The aim of this research is to analyze the results of validity and practicality tests on the "Sync Edu"learning website and analyze the effectiveness of implementing the "Sync Edu"learning website on high school students' learning outcomes on momentum and impulse material. This research is development research using the Research and Development type of research with the ADDIE (Analyze, Design, Development, Implementation, and Evaluate) development design. one group pretest-posttest design was used as the research design. The sampling technique used was simple random sampling where the sample was class XI A2 as the experimental class. This research uses data collection techniques in the form of validation questionnaires, student and teacher respondent questionnaires, as well as pre-test and post-test questions related to momentum and impulse material based on the merdeka belajar curriculum. The results of the research show that there is an influence on the effectiveness of developing the Sync Edu website on momentum and impulse material with an N-gain of 0.58 and categorized as medium in the experimental class. there is an increase in students' pre-test and post-test results. Meanwhile, the results of validity tests, readability and student responses regarding the use of the Sync Edu website show that this website has a validity value at an interval of 3.45 so it can be declared valid. © 2026 Author(s).
Physics Education, Faculty of Mathematics and Science, State University of Surabaya, Ketintang Rd, Ketintang, Gayungan, East Java, Surabaya City, Indonesia
