126 Berkala Ilmiah Pendidikan Fisika ISSN : 2337-604X (print) ISSN : 2549-2764 (online) Vol 8 No 2 2020 https://ppjp.ulm.ac.id/journal/index.php/bipf page 126-132 Analysis of Students’ Understanding of Motion Concept with Video based Learning Assisted by Tracker Software Nur Utami Amaliah, I Wayan Darmadi, and Sahrul Saehana* Physics Education Study Program, Universitas Tadulako, Indonesia sahrulsaehana@gmail.com DOI:10.20527/bipf.v8i2.8369 Received : 24 April 2020 Accepted : 30 June 2020 Published : 30 June 2020 Abstract This study aims to determine and analyze students' understanding of the motion concept taught with video-based learning assisted by Tracker Software. The subjects of this descriptive qualitative research were 30 students from 10th grade at SMA Negeri 5 Palu. The instruments in this study were multiple-choice tests and interviewed guide. Multiple- choice tests are used with reasons and are equipped with a Specific Response Index (CRI). It was given before and after video-based learning assisted by Tracker Software applied. To add the information about students' understanding, the interview with a few respondents was done. Respondents were selected based on subjects' written test results in the high, medium, and low categories. They also were interviewed related to their conception and certainty of their answers. In learning by using video-assisted by tracker software, the student also employed the worksheet in experimenting. The results showed that a conceptual understanding of student motion on the initial test could be categorized as low. After using video media that is assisted by Tracker Software, students' conceptual understanding increases. Thus, the teacher can use video media and software to teach physics concepts that can be directly observed and displayed using mathematical and graphical representations. Keywords: Understanding; motion concept; video based learning; tracker © 2020 Berkala Ilmiah Pendidikan Fisika How to cite: Amaliah, N. U., Darmadi, I. W., & Saehana, S. (2020). Analysis of students’ understanding of motion concept with video based learning assisted by tracker software. Berkala Ilmiah Pendidikan Fisika, 8(2), 126-132. INTRODUCTION Physics is a part of natural science that explains phenomena that occur in the universe and presented with facts, concepts, principles, and laws. Therefore, studying physics at school must emphasize more on the process of extracting the concept so that it can be interesting for the students (Annisa, Lesmono, & Yushardi, 2020). The reality shows different that learning physics in class is more related to formulas and theories written in the handbook. Therefore, students tend to memorize physics concepts and have a low conceptual understanding (Viajayani, Radiyono, & Rahardjo, 2013). Bloom, Engelhart, Furst, Hill, & Krathwohl (1956) define concept understanding as to the ability to capture ideas such as being able to express a