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Program Studi Pendidikan Matematika, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Islam Lamongan, Jl. Veteran No. 53A, Lamongan, Jawa Timur-Indonesia
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Vygotsky: Jurnal Pendidikan Matematika dan Matematika
Published by Universitas Islam Lamongan
ISSN : 26562286     EISSN : 26565846     DOI : 10.30736
Core Subject : Education,
Mathematics
Vygotsky: Jurnal Pendidikan Matematika dan Matematika adalah jurnal yang bertujuan untuk mengungkap fakta, masalah, dan pemecahan masalah dalam bidang pendidikan matematika dan matematika.
Arjuna Subject : Matematika - Matematika (Lain-Lain)
Articles 132 Documents
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The Effect of GeoGebra-Based Instruction on Students’ Conceptual Understanding of Exponential Functions Amalia Rasikhah Earliand; Alfisyahra Alfisyahra; Muh Hasbi; Dasa Ismaimuza
Vygotsky: Jurnal Pendidikan Matematika dan Matematika Vol. 8 No. 1 (2026): Vygotsky: Jurnal Pendidikan Matematika dan Matematika
Publisher : Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/voj.v8i1.1333

Abstract

Exponential functions pose conceptual challenges for secondary students due to their abstract nature. This quasi-experimental study investigated the effect of GeoGebra-based instruction on Grade 10 students’ conceptual understanding in two Indonesian senior high schools (N = 132). A validated four-item essay test (r > 0.219; Cronbach’s Alpha = 0.71) was administered before and after instruction. Mann–Whitney U analysis showed a significant difference in posttest conceptual understanding between the GeoGebra and conventional groups (p < .001), with a moderate-to-large effect size (r = 0.44). These results provide classroom-based empirical evidence that dynamic visualization through GeoGebra strengthens students’ conceptual understanding and supports its structured integration in conceptually demanding mathematics topics.
Optimization of Sandblasting Project Scheduling at PT. Prima Saka Engineering Using the Hungarian Algorithm Jihan Tria Marena Marena; Nia Nurfitria
Vygotsky: Jurnal Pendidikan Matematika dan Matematika Vol. 8 No. 1 (2026): Vygotsky: Jurnal Pendidikan Matematika dan Matematika
Publisher : Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/voj.v8i1.1335

Abstract

This study employs the Hungarian Algorithm to optimize the sandblasting project scheduling at PT. Prima Saka Engineering. Five workers (P1-P5) with different specializations were assigned five tasks: surface preparation (T1), exterior sandblasting (T2), interior sandblasting (T3), primer application (T4), and final quality inspection (T5). The goal was to reduce overall completion time, with each worker being assigned to only one task. The methodical steps comprised matrix building, reduction, and optimality testing. The Hungarian Algorithm generated an optimal assignment with a minimal total time of 1,128 hours, saving 222 hours (16.4%) compared to the previous 1,350-hour method. This study demonstrates that the Hungarian Algorithm provides a mathematically optimal and practically applicable framework for strategic resource allocation and project management.

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