<![CDATA[This research aims to determine whether the application of the Problem Based Learning (PBL) learning model assisted by animated videos can improve students' understanding of mathematical concepts in three-dimensional material in class XII IPA-3 SMA Negeri 1 Silima Pungga-Pungga. There are 32 students in class XII IPA-3 who are the subjects of this research and their ability to understand mathematical concepts in three-dimensional material by applying the Problem Based Learning (PBL) learning model assisted by animated videos is the object of this research. The data collection techniques used were tests and non-tests in the form of mathematical literacy ability tests and observation. This research is Classroom Action Research (PTK) which was carried out in 2 cycles. The results of data analysis obtained in cycle 1, the average value of understanding mathematical concepts was 70.208 with 14 students (43.75%) who completed it and then increased in cycle 2, the average was 85.2501 with 28 students (87.5%) which is complete. And student activity as seen from the results of observations also increased, where in the presentation of student activity in cycle 1 it reached 56.11% in the quite active category, and in cycle 2 it reached 76.17% in the active category. So, from these results, the test results show that students' ability to understand mathematical concepts increases in each cycle, at least 85% of students in the class achieve a mathematical literacy ability score of ≥ 75. So, it can be concluded that by implementing the Problem Based Learning (PBL) learning model assisted by animated videos, it is possible to improve students' understanding of mathematical concepts in three-dimensional material in class XII IPA-3 SMA Negeri 1 Silima Pungga–Pungga.]]>
