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All Journal Jurnal Karya Pendidikan Matematika Jurnal Ilmiah Multidisiplin Ilmu Jurnal Padamu Negeri Journal of Organizational and Human Resource Development Strategies Dedicated: Journal of Community Services (Pengabdian kepada Masyarakat)
Deny Hadi Siswanto
Muhammadiyah Mlati Senior High School
Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Mathematics Other

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ASSESSING THE ETHNOMATHEMATICAL VALUES OF GUDEG JOGJA: A QUALITATIVE INQUIRY INTO THREE-DIMENSIONAL SPATIAL DECOMPOSITION AND SEQUENTIAL PROGRAMMING Wuri Astiwi; Deny Hadi Siswanto
Jurnal Padamu Negeri Vol. 3 No. 2 (2026): April : Jurnal Padamu Negeri (JPN)
Publisher : CV. Denasya Smart Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69714/yjwmsg46

Abstract

This study aims to identify and analyze mathematical concepts embedded in the processing of Gudeg Yogyakarta through an ethnomathematical approach. The research employed a qualitative method with an educational ethnographic design. The research subjects consisted of traditional gudeg producers, besek craftsmen, and home-based gudeg industry practitioners in the Yogyakarta region, selected purposively. Data were collected through participant observation, in-depth interviews, and visual documentation to capture cultural practices and the underlying mathematical meanings. Data analysis was conducted descriptively and analytically through the stages of data reduction, data display, and conclusion drawing by transforming cultural activities into formal mathematical representations. The results indicate that the gudeg processing process contains various mathematical concepts, including three-dimensional and plane geometry in raw materials and packaging, fractions and ratios in ingredient measurements, sequences and series in the canning process, and algorithmic logic in deep cooking techniques. These findings confirm that Gudeg Yogyakarta has significant potential as a meaningful, contextual mathematics learning resource grounded in local wisdom.
Innovating aromatherapy candles from used cooking oil for student entrepreneurship Siti Atwano Pisriwati; Deny Hadi Siswanto; Nurcahyo Yogyanto
Dedicated: Journal of Community Services (Pengabdian kepada Masyarakat) Vol. 3 No. 1 (2025): Dedicated: Journal of Community Services (Pengabdian kepada Masyarakat)
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/dedicated.v3i1.81400

Abstract

Improper disposal of used cooking oil can harm the environment and disrupt aquatic ecosystems. A creative solution is repurposing it into aromatherapy candles, which offer relaxation and health benefits. This study aims to educate 11th-grade science students at SMA Muhammadiyah Mlati on reusing used cooking oil through aromatherapy candle-making training. The program involves raising awareness of the environmental risks of used cooking oil and conducting hands-on workshops where students create candles infused with essential oils such as patchouli and lemon, which also serve as natural mosquito repellents. The findings indicate a significant increase in students' interest in aromatherapy candle-making and entrepreneurship, as reflected in the rising interest levels after training. Moreover, this initiative fosters environmental awareness and opens opportunities for waste-based entrepreneurship. Therefore, producing aromatherapy candles from used cooking oil can help reduce pollution while enhancing students' skills and entrepreneurial mindset. Continuous support from schools and relevant institutions is essential to expand similar sustainable waste management programs.   Abstrak Pembuangan minyak goreng bekas yang tidak tepat dapat merusak lingkungan dan mengganggu ekosistem perairan. Solusi kreatifnya adalah dengan memanfaatkannya kembali menjadi lilin aromaterapi, yang menawarkan manfaat relaksasi dan kesehatan. Penelitian ini bertujuan untuk mendidik siswa kelas 11 MIPA di SMA Muhammadiyah Mlati tentang penggunaan kembali minyak goreng bekas melalui pelatihan produksi lilin aromaterapi. Penelitian ini melibatkan peningkatan kesadaran tentang risiko lingkungan dari minyak goreng bekas dan lokakarya langsung di mana siswa membuat lilin yang diresapi dengan minyak esensial seperti nilam dan lemon, yang juga berfungsi sebagai pengusir nyamuk alami. Hasil program menunjukkan peningkatan yang signifikan dalam minat siswa terhadap pembuatan lilin aromaterapi dan kewirausahaan, seperti yang ditunjukkan oleh peningkatan tingkat minat pasca pelatihan. Selain itu, inisiatif ini menumbuhkan kesadaran lingkungan dan membuka peluang untuk kewirausahaan berbasis limbah. Oleh karena itu, memproduksi lilin aromaterapi dari minyak goreng bekas dapat membantu mengurangi polusi sekaligus meningkatkan keterampilan dan pola pikir kewirausahaan siswa. Dukungan berkelanjutan dari sekolah dan lembaga terkait sangat penting untuk memperluas program pengelolaan limbah berkelanjutan serupa. Kata Kunci: kewirausahaan; lilin aromaterapi; minyak goreng bekas; pelatihan
EFFECTIVENESS OF THE DEEP LEARNING APPROACH IN ENHANCING STUDENTS' CRITICAL THINKING SKILLS ON MATRIX MATERIAL Kintoko Kintoko; Stevanus Budi Waluya; Deny Hadi Siswanto
Jurnal Karya Pendidikan Matematika Vol 12, No 1 (2025): Jurnal Karya Pendidikan Matematika Volume 12 Nomor 1 Tahun 2025
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/jkpm.12.1.2025.79-85

Abstract

This study investigates the effectiveness of the Deep Learning approach in enhancing students' critical thinking skills in matrix material. The approach emphasizes deep understanding, enabling students to analyze, interpret, and connect concepts comprehensively. A quasi-experimental design with a nonequivalent control group was employed, involving tenth-grade students at Muhammadiyah Kalasan Senior High School. The research sample consisted of two classes: the experimental class (X-A), which applied the Deep Learning approach, and the control class (X-B), which used conventional teaching methods, with 28 students in each group. To evaluate learning improvement, both groups took a pretest before treatment and a posttest afterward. Data analysis utilized an independent sample t-test to test the hypothesis and an n-Gain test to assess critical thinking skill improvement. Results indicated a significant increase in students' critical thinking abilities, with the experimental group outperforming the control group (sig. 0.000 < 0.05). The highest improvement was in the Situation aspect (56.43), while the Overview aspect showed the least growth (6.43). The average score increased from 55.71 to 86.18, with an N-Gain of 0.68 (moderate category). Further research could explore this approach in different subjects to enhance educational quality
Leadership Strategies in Decision-Making for Senior High School Principals Helena Anggraeni Putri; Siti Atwano Pisriwati; Deny Hadi Siswanto
Journal of Organizational and Human Resource Development Strategies Vol. 1 No. 02 (2024): Journal of Organizational and Human Resource Development Strategies
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/ohds.v1i02.707

Abstract

This study seeks to investigate the leadership approaches employed by the principal in managing disciplinary violations at Muhammadiyah Mlati Senior High School. Using a qualitative case study methodology, the research focuses on gathering perspectives from the principal, teachers, and students as key sources of information. Data was collected through interviews, observations, and document analysis, with triangulation used to ensure the accuracy and depth of the findings. The results highlight three key aspects of the principal's leadership in handling disciplinary matters. First, the decision-making process involves identifying and categorizing violations committed by both teachers and students, from minor to serious offenses, to determine suitable disciplinary measures. Second, the principal investigates the root causes of these violations to address the underlying issues contributing to rule-breaking. Third, the study demonstrates that the principal considers the broader effects of decisions on both students and teachers, emphasizing the importance of effective communication and socialization strategies to foster better discipline across the school. These leadership practices are crucial in creating a more disciplined and supportive learning environment.
CRITICAL THINKING IN MATRIX-BASED CRYPTOGRAPHY: INFORMING DEEP LEARNING ELECTRONIC MODULES FOR INCLUSIVE EDUCATION Nanik Tri Purwaningsih; Deny Hadi Siswanto
Jurnal Padamu Negeri Vol. 3 No. 4 (2026): Oktober : Jurnal Padamu Negeri (JPN)
Publisher : CV. Denasya Smart Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69714/p5yvt225

Abstract

This study aims to analyze students’ critical thinking skills in matrix topics within a cryptography context and to identify the need for developing a Deep Learning-based electronic module for inclusive classrooms. Employing a mixed-methods sequential explanatory design with a case study approach, the research began with a quantitative phase involving problem-solving tests administered to 10 eleventh-grade students in an inclusive class at SMA Muhammadiyah 3 Yogyakarta. The data were analyzed descriptively using Ennis’s indicators, revealing low achievement in Reason, Clarity, and Overview, and moderate achievement in Focus and Inference. These findings indicate students’ difficulties in identifying relevant information, constructing mathematical reasoning, drawing inferences, and systematically communicating encryption-decryption procedures. The qualitative phase was conducted to explain the underlying factors and explore instructional needs through interviews, observations, and a needs analysis survey, which were analyzed using thematic analysis and the Miles and Huberman model. The integration of both phases demonstrates that conventional instruction has not sufficiently addressed the cognitive needs of students in inclusive classrooms and that a Deep Learning-based electronic module incorporating step-by-step visualizations, matrix manipulation simulations, and conceptual scaffolding is urgently needed to systematically enhance students’ critical thinking skills
Deep Learning Integrated Tourism Contextualized Matrix Digital Worksheets for Enhancing Vocational Students Critical Thinking Skills Deny Hadi Siswanto; Eni Fitriana; Kintoko Kintoko
Jurnal Padamu Negeri Vol. 3 No. 4 (2026): Oktober : Jurnal Padamu Negeri (JPN)
Publisher : CV. Denasya Smart Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69714/nh20cg87

Abstract

This study aims to develop a valid, practical, and effective interactive E-Worksheets on matrix concepts contextualized within a tourism travel framework through a Deep Learning approach to enhance students' critical thinking skills. Employing a Research and Development (R&D) design based on the ADDIE model, the research involved Phase F students at SMK Dirgantara Putra Bangsa. Data were collected using expert validation sheets, student usability questionnaires, and critical thinking pretest-posttest instruments, then analyzed via paired-sample -tests and normalized gain ( ). The results demonstrated that the E-Worksheets achieved high validity, with expert scores reaching 71.00 for subject matter and 103.00 for media (Very Valid category). The practicality assessment yielded a mean score of 72.6 (Practical category). Furthermore, the intervention significantly improved students' critical thinking skills, increasing the mean score from 55.57 to 86.20 ( ) with an average  of 0.69 (moderate-to-high level). In conclusion, the interactive tourism-contextualized E-Worksheets effectively optimizes smartphone utilization and transforms vocational mathematics learning into a meaningful, critical-thinking-driven experience.
Differentiated Assessment and Digital Visualization for Enhancing Students’ Reasoning in Conic Sections Learning M.M. Endang Susetyawati; Deny Hadi Siswanto; Alfi Uwatul Husna
Jurnal Ilmiah Multidisiplin Ilmu Vol. 3 No. 5 (2026): Oktober : Jurnal Ilmiah Multidisiplin Ilmu (JIMI)
Publisher : CV. Denasya Smart Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69714/zvr64m66

Abstract

This descriptive qualitative study, supplemented by quantitative data, evaluated advanced mathematics instruction and assessment on conic sections for Grade XII (Phase F) students. The participants included one teacher and 12 students. Data were collected through semi-structured interviews, direct observations, and document analysis. Findings revealed uneven conceptual mastery (mean: 74.17), with hyperbolas identified as the most challenging topic. Students struggled to transform algebraic equations into graphical models, where only 50.00% accurately identified essential characteristic points. Furthermore, performance on contextual problem-solving (mean: 65.83) was significantly lower than on procedural tasks (mean: 80.00). The integration of dynamic digital visualization enhanced visual comprehension, achieving a higher mean score (82.08) compared to written assessments (73.75). Continuous and differentiated assessment demonstrated a positive learning progression, increasing mean scores from diagnostic (64.58) to final tests (79.17) with 83.33% mastery. Consequently, evaluating conic sections requires continuous, differentiated approaches combining technology-assisted visualization and contextual tasks to foster higher-order mathematical reasoning.
Co-Authors Alfi Uwatul Husna Eni Fitriana Helena Anggraeni Putri Kintoko Kintoko M.M. Endang Susetyawati Nanik Tri Purwaningsih Nurcahyo Yogyanto Siti Atwano Pisriwati Stevanus Budi Waluya Wuri Astiwi