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All Journal PHI: Jurnal Pendidikan Matematika EMTEKA: Jurnal Pendidikan Matematika
Umri, Fasya Maharani
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Mathematics

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ANALYSIS OF DESCRIPTIVE QUESTIONS IN DAILY TESTS FOR THE MATHEMATICS SUBJECT IN NINTH GRADE OF JUNIOR HIGH SCHOOL Barus, Aferbina; Siregar, Tiur Malasari; Umri, Fasya Maharani; Rajagukguk, Jesika Replesia; Nur Hidayah Aini; Siahaan, Yuni Apriani
EMTEKA: Jurnal Pendidikan Matematika Vol. 7 No. 1 (2026)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/emteka.v7i1.7474

Abstract

The purpose of this study was to determine the quality of daily test items in mathematics subjects on SPLDV material for class IX in the 2024/2025 school year. The research method applied in this research is quantitative descriptive method, with samples in the form of 16 student answer sheets and question sheets. Data were collected through interviews conducted with Mathematics subject teachers, to find out the purpose and technique of preparing questions using documentation techniques copies of description question sheets and student answer sheets. Analysis of validity, reliability, difficulty level, and distinguishing power was carried out to determine the quality of the items. The results showed that in the validity analysis, there were 3 questions that were declared valid and one invalid. The results of the reliability analysis, the question was low with a Cronbach's Alpha value of 0,492, indicating weak inter-item consistency. The results of the difficulty level analysis showed that three questions were classified as easy (index 0,71–1,00), and one question was classified as moderate. And the results of the differentiating power analysis, the four description items have good differentiating power.
KAJIAN KONSEPTUAL TENTANG LIMIT FUNGSI SEBAGAI FONDASI PEMBELAJARAN KALKULUS Barus, Aferbina Br; Umri, Fasya Maharani; Aini, Nur Hidayah; Siregar, Tiur Malasari
PHI: Jurnal Pendidikan Matematika Vol 10, No 1 (2026): EDISI APRIL, 2026
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/phi.v10i1.627

Abstract

This study aims to examine the basic concept of function limits in calculus and analyze their vital role as the main foundation in learning calculus. The research method employed is a literature review, analyzing various sources such as textbooks and scientific journal articles related to limit concepts, student misconceptions, and relevant pedagogical strategies. Data analysis was conducted qualitatively and descriptively to synthesize the relationship between the concept of limits, derivatives, and integrals. The results indicate that the limit is a fundamental concept that explains functional behavior and serves as the formal basis for defining derivatives as rates of change and integrals as area accumulation (Riemann sums). The study concludes that a strong conceptual understanding of limits is essential to avoid the dominance of mechanistic procedures and to help students master advanced calculus concepts systematically. It is suggested that calculus instruction should emphasize visual representation and mathematical interpretation, although this study is limited to a literature approach without empirical field data.
Co-Authors Aini, Nur Hidayah Barus, Aferbina Barus, Aferbina Br Nur Hidayah Aini Rajagukguk, Jesika Replesia Siahaan, Yuni Apriani Tiur Malasari Siregar, Tiur Malasari