The purpose of this study was to determine the students' mathematical problem solving ability in completing the set material. The set is one of the junior high school mathematics subject matter in class VIII. The sample selection was done by purposive sampling and obtained as many as 24 students from class VIII. Data collection was carried out using a test instrument where the researcher was the main instrument and a problem-solving ability test in the form of 4 essay questions with 4 Polya indicators and interviews as a supporting instrument. The data processing technique used is to assess the results of students' answers based on indicators of problem solving abilities. The results of this study indicate that the 4 test questions given, there are still some errors found in the results of student answers in solving problem solving problems, such as: not providing the completion process, lack of understanding of the problem, errors in calculations, and incorrect conclusions due to calculation errors

The research results obtained are variations in the contribution of urea used as fillers is 15%. Based on this research, it can be said that diaper waste has the potential to control the release of urea. Furthermore, it can explain the rate of release of urea in chili plants. The purpose of this research is to develop comic-based teaching materials in algebraic forms to improve students' literacy skills. this research method is research and development (Research and Development). In developing teaching materials, researchers use 6 stages, namely (1) analyzing the product to be developed, (2) making comic scripts, (3) developing initial products, (4) expert validation and revision, (5) field trials and product revisions, and (6) manufacture of the final product. The subjects of this study consisted of expert validators, teachers and students of class X IPS 1 SMAN 1 Sintang which consisted of 20 people. The instruments used are validation, questionnaires, and questions. Based on the research, the results of the media and material validation have very feasible interpretation criteria of 86.36%, the teacher's response results have an interesting interpretation criterion of 75%, the results of the student response questionnaire have an interesting interpretation criterion of 79.75%. The conclusion of this research is; Mathematical literacy ability of students of class X IPS 1 SMAN 1 Sintang is high with an average value of 71.08%. Comics teaching materials can improve the mathematical literacy skills of high school students.