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All Journal Widya Warta Krida Rakyat Educatio Vitae JIEM JIIP (Jurnal Ilmiah Ilmu Pendidikan)
Yohanes, Rudi Santoso
Program Studi Pendidikan Matematika
Humanities Education Environmental Science Mathematics Other

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Journal : Widya Warta

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TEORI VYGOTSKY DAN IMPLIKASINYA TERHADAP PEMBELAJARAN MATEMATIKA Santoso Yohanes, Rudi
Widya Warta No. 02 Tahun XXXIV / Juli 2010
Publisher : Universitas Katolik Widya Mandala Surabaya Kampus Kota Madiun

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Abstract

Vygotsky was born in Orsha, Russia, 1896 and died in Moskow, 1934 due to tuberculosis he had suffered since the age of 38. In his so short but very productive lifetime, he produced a lot of psychology theories about intellectual development. The theories are, among others, concerned with the role of social interaction in cognitive development, the dialectic of mind and language, concept development, and the zone of proximal development. This article discusses only two of those theories namely, the role of social interaction and the zone of proximal development, as well as their implications in mathematics learning.
PROSES BERPIKIR DUA SISWA SMP DALAM MEMECAHKAN MASALAH MATEMATIKA DITINJAU DARI DOMINASI OTAK KIRI DAN OTAK KANAN Santoso Yohanes, Rudi
Widya Warta No. 01 Tahun XXXVII / Januari 2013
Publisher : Universitas Katolik Widya Mandala Surabaya Kampus Kota Madiun

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Abstract

This research aims to determine the thinking process of the junior high school students to solve mathematic problems in terms of the dominance of the left hemisphere and the right hemisphere.The subject of this study is a student whose left brain is dominant and a student whose right brain is dominant. The two students were selected from 10 junior high school students who took mathematic olympiad training fostered by the researcher.To determine the student whose left brain is dominant and the one whose right brain is dominant, Hemispheric Dominance Inventory Test was applied. While, to describe the thinking process of students in solving mathematic problems, the researcher analyzed and interpreted the steps used by students with Thinking Aloud method.The result of this research indicated that the student whose left brain is dominant tended to make use of analytic, deductive, linear and systematic approaches. Meanwhile, the student whose right brain is dominant tended to make use of visual, inductive, randomized, and divergent approaches.
PROFIL KEMAMPUAN SISWA SMP DALAM MENYELESAIKAN SOAL GEOMETRI TIDAK RUTIN DENGAN MENGGUNAKAN MODEL POLYA Santoso Yohanes, Rudi
Widya Warta No. 01 Tahun XLII/Januari 2018
Publisher : Universitas Katolik Widya Mandala Surabaya Kampus Kota Madiun

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Abstract

Non-routine problem is very important to learn. Besides to improve mathematics achievement,  non-routine problem is a means to train students to use their logic, think critically, become creative, and develop their intuition. This research was a qualitative descriptive-exploratory; it aimed to determine the profile of abilities of the junior high school students in solving non routine geometry problems using Polya model. The subjects were 10 junior high school students following Olympics coaching which were coached by the researcher. The olympics coaching model used was that the students were asked to solve the given problems using Polya’s 4-step problem solving, namely understanding the problem, devising a plan, carrying out the plan, and looking back. Students were also given the opportunity to try to resolve the problem by using their own ways. Afterward, they followed the discussion. The teacher acted as a facilitator, motivator, and consultant, who monitored whether the students’ ways worked or not. The data consisted of the students’ solving of the non-routine geometry problems; the data were analyzed qualitatively to determine if the students had used Polya’s 4-step problem solving model, and to know if there were the students’ weaknesses which were needed to be improved. The results showed that the second step of Polya model, namely devising a plan, was considered the most difficult by most students. The students still had difficulty in finding the initial idea to solve non-routine problem.  
Co-Authors Aditya, Khosmas Agustina, Sandra Arumsari, Citra Puspita Baru, Marisa Darmasari, Tantri Dian Aryani Elmarfia, Beata Maulidyah, Pipid Nirmala Sulistya Rini, Rizky Sulistyorini, Eunike Widiawati, Fithia Safira Widyaningrum, Anggun Yovita, Magdalena