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Analisis Kesalahan Kemampuan Representasi Matematis dalam mengerjakan Soal Matematika Materi Statistik Puspita, Nia; Caswita, Caswita; Wijaya, Agung Putra
Mandalika Mathematics and Educations Journal Vol 7 No 4 (2025): Desember
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v7i4.10577

Abstract

Mathematical representation ability is the competence to present mathematical ideas in symbolic, visual, or verbal forms. This descriptive qualitative research aims to analyze students' errors in solving statistics problems based on mathematical representation ability, conducted through a literature study. The results indicate that students still have difficulty representing mathematical ideas (symbolic, visual, verbal). Key errors include conceptual errors (selecting formulas), inaccuracy in charts/diagrams, and inability to connect the data context with its representation. The contributing factors are the lack of conceptual understanding and a focus on procedures. This finding is expected to serve as a reference for teachers to strengthen students' mathematical representation ability, particularly in statistics material.
SOSIALISASI TEKNOLOGI TABULAMPOT TANAMAN JAMBU DALAM RANGKA MENINGKATKAN SUSTAINABILITY KETERSEDIAAN PANGAN PADA KELOMPOK MASYARAKAT DI HANURA – PESAWARAN Widyastuti, RA. Diana; Sanjaya, Purba; Pujisiswanto, Hidayat; Wijaya, Agung Putra; Munaf, Alika Fadhilah
Jurnal Pengabdian Fakultas Pertanian Universitas Lampung Vol. 4 No. 2 (2025): Jurnal Pengabdian Fakultas Pertanian Universitas Lampung Vol 4 No 2, September
Publisher : Agriculture Faculty, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jpfp.v4i2.12238

Abstract

Salah satu justifikasi membangun kreativitas pemanfaatan TABULAMPOT (tanaman buah dalam pot) pada masyarakat di Desa Hanura adalah untuk meningkatkan konsumsi pangan yang bersumber dari buah dengan prinsip bergizi, berimbang, dan sehat serta memanfaatkan pekarangan rumah, sehingga pertanian organik juga dapat diterapkan pada masyarakat Desa Hanura dengan tujuan untuk meningkatkan daya tahan tubuh agar terhindar dari virus dan bergaya hidup sehat dengan mengkonsumsi buah. Tujuan kegiatan pengabdian adalah memperkenalkan dan mempraktekkan penanaman berbagai macam jenis tanaman jambu dalam pot untuk masyarakat Desa Hanura sehingga dapat memanfaatkan pekarangan rumah lebih efisien. Sosialisasi ini diharapkan dapat dipraktekkan di pekarangan peserta pelatihan sehingga tercapai penghijauan yang berkelanjutan. Pemanfaatan pekarangan dengan menanam buah dalam pot dapat dilakukan untuk pemenuh kebutuhan rumah tangga pemiliknya. Disamping itu menanam buah di pekarangan dapat melestarikan lingkungan karena oksigen yang dihasilkan tanaman tersebut. Rangkaian kegiatan pengabdian yang akan dilaksanakan adalah sebagai berikut: persiapan bahan dan alat pengabdian, koordinasi strategi waktu ke lokasi pengabdian, penyemaian dan pemeliharaan, pemindahan benih ke polibag dan aklimatisasi, survey ke Desa Hanura dan pengurusan administrasi, pelaksanaan pelatihan dan pembuatan laporan. Pemberdayaan masyarakat yang akan dilakukan adalah dapat meningkatan pengetahuan dan keterampilan masyarakat Desa Hanura dalam budidaya tanaman buah dalam pot (TABULAMPOT) dengan memanfaatan lahan pekarangan di sekitar rumah serta membangun kreativitas ibu-ibu rumah tangga di Desa Hanura. Masyarakat Desa Hanura memiliki peluang untuk melakukan wirausaha tabulampot karena Desa Hanura merupakan Desa yang berbatasan denga Kota Bandar Lampung yang merupakan Kota yang banyaknya perumahan dan perkantoran sehingga Desa Hanura berpotensi menjadi sasaran untuk penjualan tabulampot. Kegiatan penyuluhan dan praktik berjalan dengan lancar, diskusi pada saat kegiatan berlangsung sangat baik dan interaktif, masing-masing peserta aktif mengajukan pertanyaan seputar budidaya dan wirausaha tabulampot. Untuk mendapatkan tabulampot yang berbuah lebat atau berproduksi baik, tidak boleh menggunakan stek atau bibit yang berasal dari tanaman yang belum pernah berbuah.
The effect of guided inquiry learning model on students' mathematical critical thinking abilities Simatupang, Ervina Farahnaz; Nurhanurawati; Wijaya, Agung Putra
Jurnal Absis: Jurnal Pendidikan Matematika dan Matematika Vol. 8 No. 3 (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.v8i3.3359

Abstract

Mathematics is an abstract discipline that requires higher-order thinking skills, particularly mathematical critical thinking, to be meaningfully understood. However, students' mathematical critical thinking skills in Indonesia remain relatively low. This study aimed to examine the effect of the Guided Inquiry learning model on students' mathematical critical thinking skills. The population of this study consisted of all eighth-grade students at a junior high school in Lampung Province, totaling 192 students distributed across six classes (VIII-A to VIII-F). The sample was selected using a cluster random sampling technique, resulting in 25 students from class VIII-D as the experimental group and 27 students from class VIII-B as the control group. This study employed a pretest–posttest control group design. Quantitative data were collected through essay-type pretests and posttests. Based on the results of the hypothesis testing using the Mann–Whitney U test at a significance level of α = 0.05, the median N-gain of students' mathematical critical thinking skills in the Guided Inquiry group was higher than that of students who experienced conventional learning. These findings indicate that the application of the Guided Inquiry learning model has a positive effect on improving students' mathematical critical thinking skills.
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.
Analysis of Test Instrument Quality in Measuring Computational Thinking Skills in Seventh Grade Junior High School Ratio Material Gustina Nandari; Ayu Kusumaningtyas; Meliyani Lutfiah; 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.v8i1.1251

Abstract

The integration of computational thinking in mathematics learning is essential to support 21st-century skills; however, assessment practices in schools still inadequately measure students’ thinking processes. This study aims to analyze the quality of a test instrument designed to measure junior high school students’ computational thinking ability on ratio material. A quantitative descriptive-evaluative method was employed involving 64 seventh-grade students. The instrument consisted of five contextual essay items developed based on computational thinking indicators: decomposition, pattern recognition, abstraction, generalization, and algorithmic thinking. Item analysis was conducted to examine validity, reliability, difficulty index, and discrimination power. The results indicate that all items were valid and the instrument showed high reliability (α = 0.81). The difficulty levels ranged from easy to moderate, while the discrimination power was categorized as sufficient to good. These findings demonstrate that the instrument is valid, reliable, and appropriate for measuring students’ computational thinking ability in mathematics learning at the junior high school level.
Quality Analysis of Mathematical Representation Test Instruments in Junior High School Statistics Nyoman Gita Gayatri; Fadhlur Rohman; Angga Saputra; 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.v8i1.1370

Abstract

This study aims to analyze the quality of an essay test instrument measuring students’ mathematical representation ability on eighth-grade statistics material, which was administered to ninth-grade students at SMP Negeri 1 Bandar Lampung. The analysis covers item validity, reliability, difficulty level, and discrimination index. This study employed a quantitative approach with a descriptive method. The research subjects were 27 ninth-grade students, while the object of the study consisted of six essay items on statistics that were developed based on indicators of mathematical representation ability. The results show that only three items (numbers 2, 4, and 6) meet the validity criteria, while items 1, 3, and 5 are invalid. The reliability coefficient of the instrument is 0.685, which falls into the moderate category and is therefore acceptable. All items are categorized as easy based on the difficulty index analysis. However, the discrimination index analysis indicates that all items have low discrimination power and thus fail to distinguish between high- and low-ability students. These findings imply that the instrument requires comprehensive revision, particularly in terms of difficulty level and item quality, in order to more accurately measure students’ mathematical representation ability in statistics.
The relationship between self-efficacy and problem-solving ability in biology learning at the senior high school Maulina, Dina; Wijaya, Agung Putra; Viyanti, Viyanti; Wati, Septiana Media; Rakhmawati, Ismi; Ibrahim, Nor Hasniza; Meriza, Nadya
Biosfer: Jurnal Pendidikan Biologi Vol. 19 No. 1 (2026): Biosfer: Jurnal Pendidikan Biologi
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/biosferjpb.58149

Abstract

This study aims to examine the relationship between self-efficacy and problem-solving ability in the topic of the human reproductive system at the senior high school level (SMA). The research employed a quantitative correlational design. A total of 65 students were selected using purposive sampling. Data were collected through a self-efficacy questionnaire and an open-ended test to measure problem-solving skills. The data were analyzed using regression analysis, preceded by a Pearson product-moment correlation test at a significance level of α = 0.01, with prerequisite tests applied. The results showed that the self-efficacy of Grade XI students at senior high school in the human reproductive system topic fell within the moderate category as much as 37%, while their problem-solving ability was in the adequate category in 45%. Statistical analysis yielded a significance value (2-tailed) of 0.00<0.01 and a calculated correlation coefficient as much as 0.700> 0.244 this indicates a positive and highly significant relationship between self-efficacy and problem-solving ability, with a strong correlation strength. In conclusion, there was a significant positive relationship between students' self-efficacy and their problem-solving abilities in biology learning, specifically concerning the human reproductive system material.
Peningkatan Kompetensi Guru dalam Merancang Pembelajaran dengan Pendekatan Deep Learning Wijaya, Agung Putra; Maulina, Dina; Viyanti, Viyanti; Rinaldi, Daniel
Jurnal SOLMA Vol. 15 No. 1 (2026)
Publisher : Universitas Muhammadiyah Prof. DR. Hamka (UHAMKA Press)

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Background: Implementasi pendekatan deep learning di salah satu SMA Negeri di Kabupaten Pesawaran Propinsi Lampung masih menghadapi tantangan. Para guru mengaku masih dominan menggunakan pendekatan konvensional dalam pembelajaran. Oleh karena itu, diperlukan kegiatan pelatihan bagi para guru yang bertujuan untuk meningkatkan kompetensi para guru dalam mengimplementasikan pendekatan deep learning. Metode: Kegiatan ini dilaksanakan melalui metode pelatihan kerja dengan melibatkan 39 guru. Metode ini dilaksanakan dalam 3 tahap, yakni off the job training, on the job training, dan off the job training. Evaluasi kegiatan ini dilaksanakan melalui pemberian pretest dan posttest yang selanjutnya dilakukan analisis Ngain. Hasil: Hasil pretest menunjukkan bahwa para peserta hanya mencapai sekitar 27% dari skor maksimal sehingga pemahaman awal yang dimiliki para peserta masih lemah. Setelah mendapatkan paparan materi, diskusi, dan menyusun rancangan pembelajaran, terjadi peningkatan rata-rata hasil posttest jika dibandingkan dengan rata-rata hasil pretest dengan variasi perbedaan pemahaman yang semakin sempit. Kesimpulan: Kegiatan ini efektif dalam meningkatkan kompetensi para guru dalam merancang pembelajaran dengan pendekatan deep learning. Hal ini ditunjukkan dengan (1) rata-rata peningkatan kompetensi guru dalam merancang pembelajaran dengan pendekatan deep learning tergolong tinggi dan (2) sebanyak 71.79% guru memperoleh peningkatan dengan interpretasi tinggi.
THE IMPLEMENTATION OF STEM-INTEGRATED PROBLEM-BASED LEARNING TO IMPROVE STUDENTS’ MATHEMATICAL REASONING ABILITY Senawati, Aulia; Noer, Sri Hastuti; Wijaya, Agung Putra
JP2M (Jurnal Pendidikan dan Pembelajaran Matematika) Vol 11, No 2 (2025)
Publisher : Universitas Bhinneka PGRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29100/jp2m.v11i2.7575

Abstract

In the era of the industrial revolution 4.0, improving students' mathematical reasoning abilities is crucial. Student-centered, collaborative, contextual, and inclusive learning is key to facing this era. This study aimed to determine the improvement of the implementation of STEM-integrated problem-based learning on students' mathematical reasoning abilities. The population in this study were all VIII grade students of SMP Negeri 4 Bandar Lampung in the 2024/2025 academic year, which were distributed into 10 classes. The samples in this study were students of class VIII I as the experimental class and class VIII J as the control class, which were selected by a purposive random sampling technique. The research design used is the pretest-posttest control group design. Data on mathematical reasoning ability in quantitative data was collected through test instruments in the form of descriptions on the material of the system of linear equations of two variables. Data analysis used the Mann-Whitney U test. The test results indicate that the increase in mathematical reasoning abilities of students who participated in STEM-integrated problem-based learning was higher than that of students who took part in conventional learning. This study concludes that implementing learning with STEM-integrated, problem-based learning can improve students' mathematical reasoning abilities.
THE EFFECT OF PROBLEM BASED LEARNING MODEL ON STUDENTS MATHEMATICAL CRITICAL THINKING ABILITY Mufidah, Hasna; Caswita, Caswita; Wijaya, Agung Putra
JP2M (Jurnal Pendidikan dan Pembelajaran Matematika) Vol 11, No 2 (2025)
Publisher : Universitas Bhinneka PGRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29100/jp2m.v11i2.7791

Abstract

This quasi-experimental study sought to assess the impact of the problem-based learning model on students' abilities in mathematical critical thinking. The population for this study consisted of all seventh-grade students at SMP Negeri 8 Bandar Lampung during the 2024/2025 academic year, totaling 231 students distributed across eight classes. The samples in this study were selected from two groups of 28 students and 27 students, chosen through cluster random sampling. The research design employed was a pretest-posttest group design. The data for this study were quantitative, collected from tests assessing students' mathematical critical thinking abilities. According to the results of hypothesis testing using the t-test, students who engaged in the problem-based learning model demonstrated a more substantial increase in their mathematical critical thinking skills than those who participated in the STAD-type cooperative learning model. This finding suggests that the problem-based learning approach significantly influences the development of students' mathematical critical thinking abilities.