Penelitian ini bertujuan untuk mengetahui kemampuan pemahaman konsep matematis dan kemampuan pemecahan masalah matematis siswa pada materi Sistem Persamaan Linear Dua Variabel (SPLDV). Penelitian ini dilaksanakan pada semester genap tahun ajaran 2017/2018 di Pekanbaru. Populasi pada penelitian ini adalah seluruh siswa kelas VIII SMP IT Dar Al-Ma’arif Pekanbaru dengan jumlah sampel sebanyak 28 orang siswa. Instrumen penelitian yang digunakan berupa soal tes kemampuan pemahaman konsep dan kemampuan pemecahan masalah matematis. Metode penelitian yang digunakan adalah desain penelitian kualitatif. Data dianalisis dengan menggunakan reduksi data, penyajian data, dan penarikan kesimpulan. Berdasarkan hasil penelitian dapat disimpulkan bahwasanya kemampuan pemahaman konsep matematis dan kemampuan pemecahan masalah matematis siswa SMP pada materi SPLDV masih rendah terutama dalam mengaplikasikan dalam kehidupan sehari-hari.
Artikel ini bertujuan untuk mendeskripsikan peranan model Problem Based Learning (PBL) terhadap kemampuan pemecahan masalah matematis dan kemandirian belajar siswa. Jenis penelitian yang digunakan adalah penelitian deskiptif kuantitatif yang dilakukan pada siswa dan guru MTs. PP. Ansharullah kelas VII. Teknik pengumpulan data yang digunakan dalam artikel ini melalui wawancara dengan siswa dan guru, observasi, dan studi literatur yang dianalisis secara deskriptif.
This research is aimed at developing computer-based media for mathematics learning. This media used interactive model to help students understand the topic of lines, angles and rectangular. This development research applied development model by Borg and Gallmodified by Sugiyono.The study began by finding the potentials materials and its problems followed by astudy of literature. The subject in this research is line, angle and rectangular,including rectangle, square and trapezium. Product design was done through two stages: paper-based design and computer-based. The applications used for product design are Microsoft Frontpage, Microsoft Power Point and Photoshop. Learning media were validated by three experts or validators and were revised based on the input from the validators. The revised learning media were tested on two stages: a small group test consisting of five respondens and a large grouptest consisting of forty respondens. Based on the analysis of data and discussion, it can be concluded that computer-based mediafor mathematics learning is valid with an average score of 3.17 on aspect of materials and 3.18 from aspects of media. This computer-based media formathematicslearning also had practicalities with an average score of 97,92% on a small group test and 99,22% in the large group test..
This research was motivated by the lack of learning devices that are considered to be able to train students mathematical problem solving abilities. The purpose of this study was to develop mathematical learning tools that meet the valid, practical, and effective requirements to improve the mathematical problem solving abilities of students in grade VIII SMP on flat side space. The development model used was the 4D model. Based on the results of the validation data analysis, it was concluded that the learning device developed was valid. The results of the syllabus validation were 80.56%, RPP 81.43%, LKPD 87.34%, pretest questions 78.94%, posttest questions 79.86%. This learning tool fulfills the practical requirements in large group trials with an average performance result of 93.06% and an average questionnaire response of students 91.21%. The use of effective learning tools has improved the student learning outcomes. Development of learning tools can significantly improve students mathematical problem solving abilities at a significant level of 0,000 with α = 0.05. This shows that the learning tools that was developed already meet the valid, practical, and effective requirements and can improve students' mathematical problem solving abilities.
This study aims to investigate math teacher learning activity that student’s critical thinking ability development-oriented. The subject is four junior high school math teachers who observed for three meeting each person. The research data is collected by the observation sheet and analyzed descriptively. The result shows that the learning process by the teachers has not been optimally oriented at student’s critical thinking ability development.
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