This study aims to analyze students' difficulties in working on ellipse problems. Descriptive research with a qualitative approach is the type of this research. Students of the Mathematics Education Study Program at Widya Dharma University, Klaten who are taking the analytical geometry course were selected as the subjects of this study. This study places the role of the researcher as the main instrument and the ellipse test and interview guidelines as supporting instruments. The triangulation method technique by comparing the results of the ellipse test with interviews is used to obtain valid data on the difficulties experienced by students in working on ellipse problems. The three stages of data analysis in this study include data condensation, data presentation, and drawing conclusions. The results of this study are that students' difficulties in working on ellipse problems include difficulty in conveying reasons for the answers given based on a geometric review and forgetting the formula for lateral recta.

Mathematics is often understood as an abstract discipline and independent of cultural values, whereas in the cultural practice of society, mathematical concepts are usually integrated into cultural traditions and artifacts. In the context of meaningful and culturally relevant mathematics education, it is essential to explore mathematical knowledge embedded in local cultural practices. Through a qualitative approach with ethnographic design, this study examines ethnomathematics on traditional headgear of Jambi Malay women, focusing on mathematical concepts integrated with the shape, motif, and technique of folding the navel. The study results show that at least 5 shapes of tenaculum represent geometric concepts such as folding symmetry patterns, geometric transformations, angles, and pattern repetitions that resemble flat shapes and 3-dimensional shapes. Each design and shape of the tengkuluk fold has geometric characteristics and philosophical values, such as harmony with nature and the social structure of the Jambi community. This research contributes to developing ethnomathematics-based mathematics learning design by integrating contextual, project-based learning, and inquiry approaches. Thus, this study not only enriches the ethnomathematical literature in Indonesia but also bridges the gap between modern science and local wisdom in the context of meaningful and culturally relevant mathematics education.

Batik Ceplok Kasatrian is an Indonesian cultural heritage that is full of philosophical meaning but is less known by the younger generation. Therefore, the integration of batik in mathematics learning can be one of the strategies to preserve tradition of batik culture. This research aims to explore mathematical concepts, such as geometry, algebra, arithmetic, and statistics, in Batik Ceplok Kasatrian motifs. This research uses qualitative-ethnographic. The subject of this study is the Batik Ceplok Kasatrian motif. Data validity is obtained through source triangulation, while data analysis includes reduction, presentation, and conclusion. The exploration process is carried out by answering four main questions: "Where do I begin exploring?", "How can I discover it?", "How will I know if it has discovered something important?", and "How can I make sense of it?". The results show that of the four mathematical concepts, only two mathematical concepts are found in this batik, namely geometry and arithmetic. Geometry subconcepts include transformation (reflection, translation, dilation) and plane geometry (line segments, symmetry, congruence). Arithmetic subconcept includes integers (odd-even numbers). These findings can be integrated into mathematics learning through the development of ethnomathematics-based assessments oriented towards High Order Thinking Skills.

Kemampuan penalaran matematis dan self-efficacy merupakan dua komponen penting yang sangat mempengaruhi proses dan hasil belajar matematika peserta didik. Penelitian ini bertujuan untuk mengetahui peningkatan kemampuan penalaran matematis siswa SMK melalui penerapan model Problem-based Learning berbantuan Kahoot. Metode penelitian yang digunakan adalagh quasi eksperimen dengan desain nonequivalent control group design. Subjek penelitian terdiri dari dua kelas XI SMK Pasundan 2 Bandung, yaitu kelas Eksperimen yang menggunakan model Problem-based Learning berbantuan Kahoot dan kelas kontrol yang menggunakan model pembelajaran konvensional. Instrumen yang digunakan berupa tes uraian kemampuan penalaran matematis. Analisis data dilakukan menggunakan uji-t, uji Mann-Whitney, dan uji N-gain. Hasil penelitian menunjukkan bahwa siswa yang menggunakan model Problem-based Learning berbantuan Kahoot memiliki peningkatan kemampuan penalaran matematis yang signifikan dibandingkan dengan siswa yang menggunakan model pembelajaran konvensional. Dengan demikian, model Problem-based Learning berbantuan Kahoot efektif untuk meningkatkan kemampuan penalaran matematis.

This research aims to conduct a literature review related to the analysis of student errors in solving math story problems based on Newman stages solving math story problems based on Newman's stages at all education levels. This research uses the SLR (Systematic Literature Review) method to collect data. The process data collection process was carried out by identifying or reviewing all articles relevant to the research topic published in the 2019 period. Relevant to the research topic published in the period 2019-2023. The search results found 200 articles that matched the review theme through the Google Scholar database using Harzing's Publish or Perish application. From the results of this study, it is known that there are fluctuations in the number of studies conducted in the last 5 years. Based on the criteria research criteria, most of the studies were conducted on elementary, junior high, and high school students, especially on fractions, arithmetic on fractions, social arithmetic, SPLDV, integers, sets, statistics, derivatives, and SPLTV, with the majority of research subjects came from West Java and West Nusa Tenggara. West Java. Common student errors found were errors in reading error, comprehension error, transformation error, process skill errors in encoding error, incomplete conclusions which are very important to be considered, and incomplete findings which are very important to pay attention to in learning mathematics learning. Keywords: Student Error, Story Problem, Newman Stages

The purpose of this article is to explain the relationship between the PBL learning model and students' problem solving abilities using a STEM approach. The method used in this article is a systematic literature review (SLR). A systematic literature review is carried out by searching various written sources originating from books, articles and journals, or documents that are relevant to the problem being studied. This research used 14 articles that met the inclusion criteria, namely with research subjects of middle school - high school students, meeting syntax 1-4 and between 2015 and 2023. These articles were searched using national and international journal databases, namely Google Scholar, Researchgate, Scopus and Science Direct . This article concludes that the ability of middle school or high school students when solving a problem increases after implementing the PBL learning model with a STEM approach. The next recommendation for researchers is to dig deeper into the use of the PBL model and its consequences in problem solving at a further level with a different approach.

This study aims to explore the integration of the set theory concept in mathematics with Islamic values found in hadiths, as well as its implementation in teaching based on the principle of tawhid (Islamic monotheism). Using a literature review method and a thematic analysis approach, this research identifies the connections between set theory concepts—such as the universal set, subsets, and set relations—and Islamic principles like tawhid, Islamic brotherhood (ukhuwah Islamiyah), and the classification of people based on faith as reflected in authentic hadiths. The findings reveal that these mathematical concepts can be analogized to Islamic teachings, thus providing a spiritual dimension to mathematics learning. The integration approach is expected to enhance students' conceptual understanding while also shaping their character in accordance with Islamic values. This study recommends developing mathematics learning strategies grounded in religious values to strengthen the relationship between science and Islamic teachings.

Mathematics is a fundamental science that plays an important role in everyday life. However, students' learning outcomes in this subject are still relatively low because the learning process is still dominated by conventional methods, which tend to make students feel bored and less interested. To overcome this problem, it is necessary to implement a more active learning model, in which students take on the primary role in the learning process, while the teacher acts as a facilitator. This study aims to determine the mastery of mathematics learning outcomes of seventh-grade students at SMPN 8 Lubuklinggau after participating in the cooperative learning model of Think Pair Share (TPS). The population consists of all seventh-grade students at SMPN 8 Lubuklinggau in the 2024/2025 academic year, totaling 224 students, with a sample of 32 students from class VII F. Data collection was conducted using a test technique in the form of four essay questions. The results of the t-test analysis showed that = 2,5 dan = 1,6955 (> ). Thus, it can be concluded that the average mathematics learning outcomes of seventh-grade students at SMPN 8 Lubuklinggau after participating in the Think Pair Share cooperative learning model are significantly complete. The students' average score was 72, with a mastery level reaching 78%

Teachers play a central role in determining the success of the educational process, especially in mathematics learning, which requires a deep understanding of the subject matter. A professional mathematics teacher is expected to possess adequate Mathematical Content Knowledge (MCK) to deliver the material effectively. Therefore, prospective teachers need to be equipped not only with pedagogical skills but also with strong content mastery. This level of knowledge can be analyzed through the dimensions of the Revised Bloom’s Taxonomy, which includes factual, conceptual, procedural, and metacognitive knowledge. This study aims to identify the Mathematical Content Knowledge abilities of prospective mathematics teachers based on the Revised Bloom’s Taxonomy. The research used a quantitative method. The population consisted of seventh-semester students in the Mathematics Education (Tadris Matematika) Program at the Faculty of Tarbiyah and Teacher Training, IAIN Syekh Nurjati Cirebon. A total of 44 students were selected using cluster random sampling. Data collection techniques included non-test (questionnaire/self-report) and test (written questions). Data analysis involved data presentation, normality testing, and difference testing.The results showed that the Mathematical Content Knowledge of prospective mathematics teachers based on the knowledge dimensions of the Revised Bloom’s Taxonomy was consistent between test results and questionnaires. The highest level of MCK was found in the procedural knowledge dimension with a percentage of 27.12% based on the test results. There were no significant differences between male and female participants. Keywords: Mathematical Content Knowledge, Prospective Teachers, Revised Bloom’s Taxonomy

This study aims to determine the effectiveness of the Project Based Learning (PjBL) learning model through the educational game media snakes and ladders on students' mathematical problem-solving abilities. The background of this national research is based on the low mathematical problem-solving abilities of students as shown by international data, as well as the still dominant use of conventional learning methods that do not actively involve students. This study uses a quantitative approach with a quasi-experimental method and a Nonequivalent Pretest-Posttest Control Group Design. The subjects of the study were grade VIII students at SMP Negeri 7 Kuningan in the 2024/2025 academic year, with samples consisting of two classes: an experimental class using the PjBL model through educational games, and a control class using conventional learning. Data were collected through pretest and posttest tests and student response questionnaires. The results showed that there was no significant difference in initial abilities between the two classes. However, after the treatment, there was a significant difference in the posttest results and an increase in the N-Gain score of mathematical problem solving ability between the experimental and control classes, which were analyzed using the Mann Whitney U non-parametric test. In addition, the results of the questionnaire showed that students gave a positive response to learning with the PjBL model through the snake and ladder educational game, with an average percentage of 75.025% in the high category. Thus, it can be concluded that the PjBL model through educational games is effective in improving students' mathematical problem solving abilities and is able to create a fun and interactive learning atmosphere.