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Deda, Yohanis Ndapa

Mathematics Education Department, Universita Timor, Indonesia

Author-ID : 931497

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EFEKTIFITAS PENGGUNAAN MEDIA PEMBELAJARAN MATEMATIKA BERBAHAN SAMPAH UNTUK MENGURANGI LEARNING LOSS AKIBAT PANDEMI COVID-19 Deda, Yohanis Ndapa; Disnawati, Hermina
Jurnal Magister Pendidikan Matematika (JUMADIKA) Vol 4 No 2 (2022): Jurnal Magister Pendidikan Matematika (JUMADIKA)
Publisher : Prodi Magister Pendidikan Matematika Pascasarjana Universitas Pattimura Ambon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/jumadikavol4iss2year2022page37-42

During the Covid-19 pandemic, there was a change in the education system, namely regular or face-to-face learning suddenly changed to learning from home (BDR). One of the difficulties is the change in the direct learning climate to online learning, which is done individually. This difficulty resulted in learning loss for students. Learning loss has a long-term negative impact, namely reduced student academic achievement and cognitive skills. Therefore, it is necessary to choose learning media to minimize learning loss due to BDR during the Covid-19 pandemic. One learning media that is suitable for the conditions of the learning community in Kefamenanu City is the Mathematics learning media made from Waste (MPMBS), namely positive and negative charges. This study aims to reduce learning loss for students in the learning community in the city of Kefamenanu. The type of research is an experimental, pre-Experimental Design, namely a One-Group Pretest-Posttest with 11 students in the Sunday school community at one of the GMIT Churches in Kefamenanu. Data collection methods are tests, questionnaires and documentation. The data analysis techniques are descriptive statistical analysis, N-Gain analysis and inferential analysis. The results showed that the average value of the pretest was 33, and the average value of the posttest was 57.17. There was an increase after the students were given the learning treatment using MPMBS with a charge of 27.57 and an average N-gain of 0.64, including the medium category. Based on the results of this study, it can be concluded that the use of waste-based MPMBS in learning integer operations can improve learning achievement while reducing learning loss in the community of Sunday school children in Kefemenanu. The next plan that will be done is to analyze the level of motivation of respondents to the use of MPMBS

Research Trends on Lesson Study Based on Google Scholar and Scopus Database: a Bibliometric Analysis Deda, Yohanis Ndapa; Disnawati, Hermina; Daniel, Otaget
Jurnal VARIDIKA Volume 35, No 1 June 2023
Publisher : Faculty of Teacher Training and Education, Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/varidika.v1i1.22663

This study investigates lesson study research trends through bibliometric analysis on widely distributed Google Scholar (GS) and Scopus databases. We reviewed 997 papers from GS and 200 documents from the Scopus database searched using Harzing's Publish on May 6 2023. A descriptive study approach was used to investigate the data. The result of this study is that the number of lesson study documents has increased over the last decade (2012-2022). The most productive author based on GS is R Huang from the United States, and the full author based on Scopus is E. Saito from Australia. While the prominent authors based on the highest citations are Fernandez Yoshida, based on GS, and Dudley, with the highest citations based on Scopus. The “International Journal for Lesson and Learning Studies” in the last decade is the most source of lesson study documents. Based on VosViewer visualization, Rosa is the author who has the most co-authorship papers and total link strength. The VosViewer displays four clusters related to lesson study: community, context, observation, and participation. Our strong recommendations regarding this study are lesson study research related to literacy, numeracy, and mathematical abilities. The results can assist relevant researchers in understanding trends in lesson study research and recommend guidelines for other studies.

Bibliometric Analysis of Higher-Order Thinking Skills Based on Google Scholar, Crossref, and Scopus Deda, Yohanis Ndapa
Jurnal VARIDIKA Volume 35, No 2 December 2023
Publisher : Faculty of Teacher Training and Education, Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/varidika.v35i2.23223

Higher-order thinking (HOT) skills are needed to analyze, evaluate, and solve problems. HOTS is an essential ability that students must have as a provision for the future and the 21st Century. However, no bibliometric research has linked Crossref, Scopus, and Google Scholar (GS) preferences on Harzing's Publish or Perish (PoP) software. This research aims to identify search preferences in PoP software version 8.9.4554.8721. The sample critical phrases entered in the preference menu are Higher-order thinking skills (HOTs) with a time range from 2018 to 2023. The library study research method used is bibliometric analysis. Metadata in the form of RIS/Refmanager files obtained from PoP is used to visualize data through VosViewer software. CSV data is used to identify top authors and top sources based on each preference. The phrases or keywords used were "HOTs," Mathematics" in GS, Crossref, and Scopus preferences. The results show four clusters of HOTS: ability, student, effect, and category. The top authors cited in Scopus are Hadi et al., Hobri et al. in GS, and Ichsan et al. in Crossref. HOTS needs to be researched more from various perspectives and methods. We recommend that future HOTS research be linked to real life to bridge the quite abstract concept of HOTS.

Efektivitas “Puzzle Rumah Perkalian” dalam Menunjang Konsep Matematika Dasar Murid Slow Learner di Kawasan Perbatasan Ndapa Deda, Yohanis; Disnawati, Hermina; Roberto Kasa , Andreas; Owa , Florida; Kusi , Esterlin
Parta: Jurnal Pengabdian Kepada Masyarakat Vol. 4 No. 2 (2023)
Publisher : Universitas Pendidikan Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38043/parta.v4i2.4592

Kegiatan ini didasari learning loss pada saat Covid-19 yang berdampak munculnya murid slow learner akibat adanya kebijakan belajar dari rumah. Tujuan kegiatan ini adalah untuk menguji tingkat efektivitas “Puzzle Rumah Perkalian” dalam menunjang konsep matematika dasar murid slow leraner di Kawasan Perbatasan Darat Indonesia dengan Republik Demokratik Timor Leste. Metode yang digunakan adalah metode kuantitatif dengan jenis eksperimen, yaitu One-Group Pretest-Posttest. Tahapan pelaksanaan penelitian ini dimulai dari perencanaan, pelaksanaan pre test, eksperimen dan postest. Jumlah murid yang terlibat adalah 18 orang siswa sekolah dasar kelas 4. Metode pengumpulan informasi merupakan tes, serta dokumentasi. Metode analisa data yang dipakai merupakan analisa statistik deskriptif, analisa N- Gain serta analisa inferensial. Hasil riset membuktikan kalau nilai rerata pretest merupakan 40,51 serta nilai rerata post test merupakan 66,29. Nyata kalau terjadi kenaikan sehabis peserta didik dikasihkan perlakuan Pembelajaran matematika memakai“ Puzzle Rumah Perkalian” sebesar 25,78 serta rerata N-gain ialah 0,43 termasuk kategori sedang. Bersumber pada hasil studi ini, bisa disimpulkan kalau aplikasi “Puzzle Rumah Perkalian” pada pembelajaran matematika materi operasi bilangan bulat khususnya pada operasi perkalian bisa mendukung matematika dasar anak didik slow learner di Area Perbatasan. Konsep berikutnya yang hendak digarap merupakan meningkatkan alat pembelajaran matematika yang sesuai buat anak didik slow learner di Area Perbatasan.

Ethnomatematics Practices in The Traditional Funeral Rituals of The East Noemuti Community Deda, Yohanis Ndapa; Tafin Nokas, Maria Krispina; Delvion, Eduardus Beo Seo; Mamoh, Oktovianus
MATH-EDU: Jurnal Ilmu Pendidikan Matematika Vol. 11 No. 1 (2026): MATH-EDU: Jurnal Ilmu Pendidikan Matematika
Publisher : Program Studi Pendidikan Matematika, Fakultas Ilmu Pendidikan, Universitas Timor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/jipm.v11i1.10833

Traditional funeral rituals contain many mathematical concepts that have not been widely explored. Therefore, this study aims to investigate the mathematical activities contained in the traditional death rituals of the East Noemuti community. The study uses a qualitative, ethnographic approach. The research subjects included atoinamaf (uncles/traditional elders), bereaved families, and community leaders in Haekto Village, East Noemuti District, North Central Timor Regency. Data were collected through observation, interviews, and documentation, and then analyzed using Spradley's ethnographic analysis techniques, including domain analysis, taxonomy, component analysis, and cultural themes. The results of the study show that in the traditional death rituals of the Noemuti Timur community, there are various ethnomathematical activities, including: (1) tutu panu, which represents a hemispherical space; (2) making coffins and digging rectangular graves of a certain size; (3) nailing the coffin with three blows, symbolizing the concept of sacred numbers; (4) the use of circular silver coins as a symbol of spiritual provisions; and (5) the practice of calculating time in the tanono procession. The traditional death rituals of the East Noemuti community are spiritually and culturally meaningful, rich with mathematical concepts that can be used as a source of contextual learning.

Comprehending Relations and Functions: Introducing and Demonstrating Papan Resi Teaching Aid Meiva Marthaulina Lestari Siahaan; Lailin Hijriani; Talisadika Maifa; Yosepha Patricia Wua Laja; Yohanis Ndapa Deda
Smart Society Vol. 2 No. 2 (2022): Smart Society
Publisher : FOUNDAE (Foundation of Advanced Education)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/smartsociety.v2i2.103

The teachers need help to convey the differences between relations and functions and to make concrete examples. The purpose of the community service team is to help students find and comprehend the theory and concept about relations and functions material for grade 8 by introducing and demonstrating the Papan Resi visual aid.The service held in SMPK Aloysius Niki-Niki, Timor Tengah Utara District, Nusa Tenggara Timur. The service method is based on action research: planning, action, observation, and reflection. The data are collected based on the audiences' observation sheets and response sheets. Data analysis used data triangulation. The results of this community service are that introducing and demonstrating Papan Resi could be beneficial for increasing students' comprehension of SMPK Aloysius Niki-Niki. The constructivist situation influences it, and the service needs to be held for other teaching aids

Co-Authors admin pythagoras, admin Anastasia N. Ernesta Manbait Ando Missa Ando Missa Bantaika, Aris Bees, Nene Lodiana Bengu, Dede Benyamin Erfin Cecilia Novianti Salsinha Daniel, Otaget Darhim Delti Yulita Delvion, Eduardus Beo Seo Donisius Uskono Farly O.Haning Fitriani Fitriani Flaviana M.V Taus García-García, Javier Heldigardis Kolo Hermina Disnawati, Hermina Hijriani, Lailin Hijriani, Lailin Juweni T. Tefi Kou, Dominikus Kusi , Esterlin Maifa, Talisadika Serrisanti Marchy Pallo Maria Biamsasi Mauk, Advensius Fitalis Merlina Sopbaba Milton Rosa Nadi Suprapto Nahak, Maria Paula Marla Oktovianus Mamoh Otaget Daniel Owa , Florida Pala, Aplonia Patrisius Nulle Ratu, Astry H Roberto Kasa , Andreas Rooselyna Ekawati Rosa, Milton Selestina Nahak Siahaan, Meiva Marthaulina Lestari Stanislaus Amsikan Suhendra Sulasri Suddin Tae, Rut Tafin Nokas, Maria Krispina Talan, Nelciana Tamur, Maximus Trifosa Alnabe, Ayu Wua Laja, Yosepha Patricia Yoseph Pius Kurniawan Kelen

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