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All Journal Kognitif: Jurnal Riset HOTS Pendidikan Matematika AFORE: Jurnal Pendidikan Matematika
Bustaren, Bill Chairy Rizki
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Computer Science & IT Education Library & Information Science Mathematics Social Sciences Other

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ANALISIS PERSPEKTIF GURU MATEMATIKA SMP DI KABUPATEN BOGOR TERHADAP STEM CHALLENGE SEBAGAI ASESMEN DALAM PEMBELAJARAN MATEMATIKA Bustaren, Bill Chairy Rizki; Priatna, Nanang; Putri, Nurmala Setianing; Ulfa, Nadia
Afore : Jurnal Pendidikan Matematika Vol 4 No 1 (2025): AFORE : Jurnal Pendidikan Matematika
Publisher : Universitas Nias Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57094/afore.v4i1.2901

Abstract

This study aims to analyze the perspectives of junior high school mathematics teachers in Bogor Regency regarding the implementation of the STEM Challenge as an alternative assessment in mathematics learning. This research uses a qualitative approach with a phenomenological method. Data were collected through open-ended questionnaires, in-depth interviews, and document studies. The results of the study reveal three findings: (1) teachers assess that the STEM Challenge is quite appropriate and has the potential to assess students' abilities, especially related to 21st century skills such as critical thinking, creativity, communication, and collaboration; (2) many teachers realize that conventional assessments (written tests) have limitations as they tend to focus only on cognitive aspects; and the last, (3), although the STEM Challenge is considered a good alternative assessment, teachers also expressed Challenges and obstacles in its implementation, including limitations in infrastructure, lack of learning time, and the need for adaptation for teachers and students. This research recommends the need for policy support, teacher training, and the provision of resources so that the STEM Challenge can be effectively implemented in order to make assessments in mathematics learning more contextual and meaningful.
Using Digital Pythagorean Tangram to Enhance Mathematical Justification Skills of Prospective Mathematics Teachers Adhitya, Yusuf; Putri, Nurmala Setianing; Bustaren, Bill Chairy Rizki
Kognitif: Jurnal Riset HOTS Pendidikan Matematika Vol. 5 No. 4 (2025): October - December 2025
Publisher : Education and Talent Development Center Indonesia (ETDC Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51574/kognitif.v5i4.4020

Abstract

Mathematical justification is a crucial skill for mathematics teachers because it emphasizes proof and reasoning. This study examines how using the media “Digital Pythagorean Tangrams,” a manipulable, multimedia tool on Polypad, can improve prospective teachers' justification skills when proving the Pythagorean theorem. This research used a one-group pretest-posttest design where students were given a pre-test, then received an intervention using the media, and subsequently completed a post-test. The participants included 44 mathematics education students at a university in Bandung. Instruments comprised a mathematical justification test (pretest and posttest) and Digital Pythagorean Tangram media. Pretest and posttest data were analysed to obtain the N-gain score to estimate the effect size. The N-gain data were analysed using a one-sample t-test to check whether the improvement was statistically significant.  The results revealed an average N-gain score of 0.42, which falls into the medium category, demonstrating a notable improvement in students' mathematical justification skills before and after using the digital tangram media. The One-Sample t-test also indicated a significance level below 0.05, confirming that the increase in students' mathematical justification ability is significant. Integrating digital manipulatives into proof-oriented instruction can meaningfully enhance prospective teachers’ justification skills and may serve as a practical pedagogical approach in mathematics teacher education.
Co-Authors Nanang Priatna Nurmala Setianing Putri Ulfa, Nadia Yusuf Adhitya