AbstrakBanyak siswa mengalami kesulitan dalam belajar matematika, namun guru tidak mempunyai banyak informasi, sehingga guru tidak dapat memberikan solusi yang terbaik. Tujuan penelitian ini untuk mendeskripsikan respon siswa, hasil belajar siswa, serta mndeskripsikan kemampuan komunikasi matematis siswa pada pembelajaran matematika dengan menggunakan jurnal reflektif. Metode Penelitian yang digunakan adalah deskriptif dengan pendekatan kualitatif dan kuantitatif dengan subjek siswa kelas VII-E di SMPN 6 Sidoarjo. Instrumen yang digunakan meliputi angket respon siswa, tes hasil belajar, dan wawancara. Analisis data kemampuan komunikasi (tulis, lisan) diperoleh dari skor yang diperoleh masing-masing subjek berdasarkan rubrik komunikasi matematis tulis dan lisan, kemudian ditentukan level kemampuan komunikasi matematis siswa. Berdasarkan hasil dan pembahasan didapat bahwa ketuntasan hasil belajar siswa 75% (rerata 78,6), respon siswa baik (3,36), kemampuan komunikasi matematis siswa rendah, sedang dan tinggi masing-masing pada tingkat 3, 4 dan 5. Penggunaan jurnal reflektif dalam pembelajaran matematika dapat melatih kemampuan komunikasi matematis dan hasil belajar siswa. AbstractMany students have difficulty learning mathematics, but the teacher does not have much information, so the teacher cannot provide the best solution. The purpose of this study was to describe student responses, student learning outcomes, and to describe students' mathematical communication skills in mathematics learning using reflective journals. The research method used is descriptive with a qualitative and quantitative approach with the subject of class VII-E students at SMPN 6 Sidoarjo. The instruments used include student response questionnaires, learning outcomes tests, and interviews. Data analysis on communication skills (written, oral) was obtained from the scores obtained by each subject based on written and oral mathematical communication rubrics, then determined the level of students' mathematical communication skills. Based on the results and discussion, it was found that the completeness of student learning outcomes was 75% (mean 78.6), student responses were good (3.36), students' mathematical communication skills were low, medium, and high at levels 3, 4 and 5 respectively. reflective in mathematics learning can train mathematical communication skills and student learning outcomes.
Abstract:Kastolan's theory divides 3 types of errors, namely conceptual, computational, and procedural errors. This study aims to analyze students' errors in solving Cartesian coordinate problems according to Kastolan's theory based on mathematical abilities. The subjects were 9 students of class 8E in a school in Surabaya. The method is descriptive qualitative with a test instrument and interviews. The results showed that conceptual errors were the most common mistakes with 12 answers or 54.5%. The remaining 6 answers or 27.3% procedural errors and 4 answers or 18.2% calculation errors. The conceptual errors of subjects with high, medium, and low mathematical abilities are wrong in determining formulas, theorems, or definitions to answer a problem, errors in using formulas and theorems, or inappropriate definitions. In the calculation error, the subject made an error in calculating the value of arithmetic operation and the placement of the constants-variables. Whereas for procedural errors the subject did not work on the problem in systematic steps.Abstrak:Teori Kastolan membagi 3 jenis kesalahan yaitu kesalahan konseptual, hitung dan prosedural. Penelitian ini bertujuan menganalisis kesalahan siswa dalam menyelesaikan soal cerita koordinat Cartesius menurut teori Kastolan berdasarkan kemampuan matematika. Subjek penelitian ini adalah 9 orang siswa kelas 8E pada salah satu Sekolah di Surabaya. Metode yang digunakan adalah kualitatif deskriptif dengan instrumen tes dan wawancara. Hasil penelitian menunjukkan bahwa kesalahan konseptual merupakan kesalahan yang paling banyak dilakukan yaitu sebanyak 12 jawaban atau 54,5%. Sisanya 6 jawaban atau 27,3% kesalahan prosedur dan 4 jawaban atau 18,2% kesalahan hitung. Pada kesalahan konseptual subjek dengan berkemampuan matematika tinggi, sedang dan rendah, salah dalam menentukan rumus, teorema atau definisi. Untuk menjawab suatu masalah, kesalahan penggunaan rumus dan teorema atau definisi yang tidak sesuai. Pada kesalahan hitung subjek melakukan kesalahan dalam menghitung nilai suatu operasi hitung dan penempatan konstanta-variabel. Sedangkan untuk kesalahan prosedural subjek tidak mengerjakan soal dengan langkah-langkah yang sistematis.
This research aim to describe the profile of cybernetic thinking of students in solving algebra problems. This research is a descriptive study with a qualitative approach using questionnaires, written tests, and interview guidelines. Intake of subjects who have Serialist and Holist thinking styles have done using purposive sampling. The results showed students who have the Serialist thinking style at the time of the Sensory Register's attention and good perception so that information stored in Short Term Memory. Retrieval done well even when rehearsal has difficulty because of forgetting certain concepts, but information has been stored well in Long Term Memory. The encoding done well. While students who have Holist style of thinking lack attention and perceptions are not structured so that information is not stored correctly in Short Term Memory. So that retrieval can not be done correctly. Therefore during rehearsal, they have difficulty in applying the settlement method because the information is not stored correctly in Long Term Memory.
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