Author

T. Turmudi

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Review Open access Sep 2026

COMPARING STUDENTS’ PERFORMANCE IN SOLVING SYSTEMS OF LINEAR EQUATIONS WITH TWO VARIABLES BASED ON EPISTEMOLOGICAL BELIEFS

Students’ difficulties in solving Systems of Linear Equations with Two Variables (SLETV) problems are often related not only to procedural understanding but also to their beliefs about knowledge and learning. This study examined differences in students’ academic performance in solving SLETV problems based on their leve...

H. Rosiyanti, J. A. Dahlan, T. Turmudi et al. · AKSIOMA · 0 citations

Open access Jul 2026

Understanding Students’ Learning Obstacles in Geometric Transformations and Their Implications for Didactical Design

Geometric transformations are one of the essential topics in mathematical learning, as they support students’ spatial reasoning, spatial visualization, and understanding of geometric relationships. Despite its importance, many students still have difficulties in interpreting transformation concepts beyond routine proce...

Pebi Pitri Anasari, T. Turmudi, D. Suryadi et al. · Jurnal Pendidikan MIPA · 0 citations

Open access Jul 2026

Trends in Research on Self-Efficacy in Mathematics Education: A Bibliometric Analysis for 2013–2025

Self-efficacy has been one of the most widely used psychological constructs in mathematics education research for over three decades. However, the development of research, the intellectual structure of the field, and its relationship to learning approaches and mathematical competence have not been comprehensively devel...

Nike Astiswijaya, T. Turmudi, Kusnandi Kusnandi et al. · ISEJ : Indonesian Science Ed... · 0 citations