Abstract
In order to tackle problems accurately and focussedly, students must have problem-solving skills. The goal of this study was to evaluate class X MIPA students at SMA Negeri 39 Jakarta in the even semester of the 2020–2021 school year. This study used a descriptive quantitative research method. As a sample, simple random sampling was utilized. According to Polya, there are four indicators of problem-solving aptitude: Understanding the problem, preparing, implementing the plan, and re-examining are the steps to take. On the topic of environmental change, the test instrument revealed that students' problem-solving abilities were in the high range. However, if we look at each indicator separately, we can see that all four are in the poor group. This is due to the fact that pupils do not double-check their written replies and continue to have doubts about the answers. Non-test instrument study, on the other hand, non-test instrument studies found that students' problem-solving abilities were excellent. Based on these findings, it can be inferred that students' overall problem-solving skills are of a high standard. Because the study's findings can't be used with all materials, problem-solving skills must be tested with different materials in the context of science.