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This study aims to determine the difficulties of students in solving Higher Order Thingking Skills (HOTS) problems by using the Polya method in Trigonometric comparison materials. This research is a descriptive qualitative research. The subjects of the study were 36 students in class X.1 of SMA Negeri 2 Situbondo. Data collection techniques use test questions, interviews and documentation. The test in the form of Higher Order Thingking Skills (HOTS) questions is carried out to measure students' abilities. Interviews were conducted on 6 students based on the category of ability level of test results. Data analysis was carried out using data induction and reduction theory. The test results showed that those who scored in the high-level category were 10 students (28%), the moderate-level category was 14 students (39%) and the low-level category was 12 students (33%). The conclusion of this study states that the difficulty of students in solving Higher Order Thinking Skills (HOTS) questions using the polya method, namely subjects with high-level categories, experience difficulties at the re-examination stage. Subjects with a moderate level category, experienced difficulties at the stage of implementing the plan and re-examining. Subjects with low-level categories experienced difficulties at all stages of polya, namely at the stage of understanding the problem, making a plan, implementing the plan and re-examining.

This research aims to analyse students' mathematical problem solving ability on length and weight measurement material in class III at SD Negeri Langgenharjo 01. This type of research is a qualitative descriptive research. The data source of this research comes from the answers to the mathematical problem solving ability description test and interviews. This study used 3 subjects from 30 grade III students who were taken using purposive techniques according to the category of mathematical problem solving ability, consisting of high, medium, and low categories. Data collection techniques used observation, interviews, and documentation. The data analysis technique used in this study used the Miles and Huberman model, namely, data collection, data reduction, data presentation, and conclusion drawing. Based on the results of research on mathematical solving ability according to Polya's level, namely, (1) Students in the high category are able to fulfil all four indicators of problem solving according to Polya's stages. (2) Students in the medium category can solve problems well, but are often less careful and often hasty. They can only fulfil 2 of the 4 problem solving indicators. (3) Students in the low category have not been able to solve the problem well. They were unable to fulfil all indicators of problem solving ability according to Polya's stages. The conclusion of this study is that students have various potentials in mathematical problem solving ranging from high, medium, and low categories.

This research uses the Polya problem-solving procedure to describe students' difficulty in problem-solving in the material about systems of linear equations in two variables. The method in this research is descriptive research. The subjects in this research were three students in Class VIII of SMP Negeri 6 Tondano. The data analysis techniques used are data presentation, data reduction and conclusion. The results of this research show that of the four stages of Polya problem solving, students who have the highest scores can fulfil all stages of Polya problem solving, students who have medium scores can fulfil three stages of Polya problem solving, and students who have high scores can fulfil two stages of Polya problem-solving.

The Problem-Solving Learning Model is one of the learning models that can develop problem-solving skills and student learning independence where this model is developed based on polya theory known as problem-solving steps, namely: identifying problem information/understanding problems, planning problem-solving strategies, using problem-solving strategies and re-examining solutions or solutions to problems that have been generated. The Use of the Problem-Solving Learning Model to Improve the Problem-Solving Ability of Pancabudi Private Vocational School Students for the 2023/2024 Academic Year. The purpose of this research is to determine the effectiveness of learning using the Problem-Solving learning model. This research is located at SMK Swasta Pancabudi where the class applies the Problem Solving learning model which will be compared with different classes using the classical learning model.