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All Journal Jurnal Absis : Jurnal Pendidikan Matematika dan Matematika Mathema: Jurnal Pendidikan Matematika
Niki Pujarwati
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Mathematics

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Classroom discourse analysis in didactical design of linear equations in one variable: The development of students' critical thinking skills Tina Yunarti; Jihan Tama Farasiska; Niki Pujarwati; Santy Setiawati
Jurnal Absis: Jurnal Pendidikan Matematika dan Matematika Vol. 8 No. 2 (2025): Jurnal Absis
Publisher : Program Studi Pendidikan Matematika Universitas Pasir Pengaraian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30606/absis.v8i2.3275

Abstract

This study aims to analyze classroom discourse within the didactical design of linear equations in one variable, focusing on the development of students’ critical thinking skills. The research employed a qualitative approach with an evaluative design. The main participants consisted of one mathematics teacher and 12 seventh-grade students (class VII-1) from a public junior high school in Bandar Lampung during the first semester of the 2024/2025 academic year. The students were grouped according to their mathematical abilities into high, medium, low, and mixed categories. Based on secondary data, the majority of the class consisted of students with low academic ability. Data were collected through observation, interviews, and documentation, while validity was ensured using triangulation techniques. Data analysis was conducted in three stages: data condensation, data display, and conclusion drawing and verification. The findings indicate that (1) the most dominant form of classroom discourse produced by students was questions and answers, highlighting the importance of designing learning activities that facilitate complex questioning and answering to support the development of students’ critical thinking skills; (2) the most frequently observed indicator of critical thinking in classroom discourse was evaluation; and (3) students with medium-level mathematical ability were the most dominant in generating classroom discourse, which was influenced by factors of comfort.
Analysis of Instrument Quality in Measuring Mathematical Logical Thinking Ability Yulia Pratiwi; Niki Pujarwati; Marlinawati Marlinawati; Agung Putra Wijaya; Chika Rahayu
MATHEMA: JURNAL PENDIDIKAN MATEMATIKA Vol. 8 No. 1 (2026): MATHEMA
Publisher : Universitas Teknokrat Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33365/jm.v8i1.1162

Abstract

The ability to think logically in mathematics is a skill that must be developed through instruction. One strategy for developing this ability is the use of high-quality instruments. Therefore, this study aims to analyze the quality of a mathematical logical thinking ability test instrument in terms of its validity, reliability, difficulty index, and discriminating power using SPSS and Microsoft Excel. This research employed a quantitative method with an evaluative analysis approach. The subjects in this study were students of class VII.6 and VII.8 at SMPN 26 Bandarlampung. The instrument used was a descriptive test consisting of ten items, developed based on four indicators of logical thinking ability, namely the ability to interpret information, the ability to predict, the ability to solve problems, and the ability to draw conclusions. The results of this study indicate that: (1) the quality of the logical thinking ability test instrument meets the criteria for 100% validity; (2) the reliability of the logical thinking ability test instrument is 0.775, categorized as reliable; (3) the difficulty level analysis shows that nine items fall into the moderate category and one item falls into the easy category; (4) the discrimination power analysis shows that four items have good discriminating power and six items have fair discriminating power.
Co-Authors Agung Putra Wijaya Jihan Tama Farasiska Marlinawati Marlinawati Rahayu, Chika Santy Setiawati Tina Yunarti Yulia Pratiwi