The direct proportion and social arithmetic are difficult topics for students. The difficulty on the topic of direct proportion is that students make mistakes in adjusting the application of direct proportions. The difficulty of social arithmetic is a mistake in determining the conditions of profit, loss, or break even. Project-based learning is an innovation for teachers and can improve students’ thinking abilities. The characteristics of the project involve some topics. Teachers are expected to work together to create learning according to expectations by implementing a lesson study system. Project-based learning that takes a long time can be overcome by using Edmodo because they can do learning without space and time limits. This research aims to determine the role of the learning trajectory in project-based learning “trade in school cooperation”. This study uses a design research method of validation studies type in seventh grade students of junior high school in Palembang. The results are the role of project-based learning in resolving direct proportions and social arithmetic through learning trajectory such as students getting more training in problem-solving procedures, better understanding the relationship of numbers proportions, and to achieve understanding in decisions of profit, loss, and breakeven situations.
Often students are only given practical problems in the form of algorithms without inviting them to think at a high level and almost never given daily problems in the form of projects. From this it can be seen that there are still teachers who have not carried out directives from the government that is to assess competencies made in the assessments that require students to demonstrate certain competencies using projects. This study aims to produce worksheets in the form of school cooperation projects on the value of direct proportion and social arithmetic, and analyze students' answers in solving these problems and the implementation of learning is carried out using a lesson study for learning community (LSLC) system. This research uses a design research method which is a form of qualitative approach. The stages in the design research type of development studies. The subjects of this study were seventh grade students of SMP Palembang. From this study, student worksheets were generated about direct proportion and social arithmetic consisting of four activities including determining the price list of goods purchased, determining the price of capital goods, reporting prices of goods and selling prices, and determining conditions of sale. Based on the results of the analysis of students' answers to worksheets, some students can perform procedures of direct proportion and determine conditions of sale (profit, loss, or break even) so that this worksheet has been deemed valid and practical to use.
This Research's purpose is producing questions/case study in direct proportion topic focused on Map and Model, and analyse students' answer in solving these arranged questions through lesson study for learning community (LSLC) and PMRI approach using problem based learning (PBL) method. Research subject are students of grade VII of Junior High School 1 Palembang. From this research, it results a LKPD questions about direct proportion in Map and Model that consist of three cases, such as determine new scale from known scale in problem solving (C2), determine size of Limas House miniature from known scale and sizes in problem solving (C3), and check for errors from a given comparison in problem solving (C4). Based on the results of the analysis of Students answer small group, the average score obtained by students in problem 1 (sharing task) is 73.5, problem 2 (sharing task) average student score is 55, and average student score in problem 3 (jumping task) is 48.5. So these three problems are well-billed and can be used to the next stage of the field test.
Mathematical literacy merupakan salah satu kemampuan yang muncul dari aktivitas pemecahan masalah matematika. Kurang tersedianya instrumen tes yang mampu mendukung peningkatan mathematical literacy menjadi salah satu penyebab rendahnya pencapaian keterampilan berpikir tingkat tinggi mahasiswa politeknik. Penelitian ini bertujuan untuk menyediakan sumber belajar melalui pengembangan soal-soal matematika bilingual berbasis mathematical literacy dengan konteks teknik mesin untuk mahasiswa vokasi di abad 21 yang valid, praktis, dan mempunyai efek potensial. Penelitian ini merupakan penelitian design research tipe development study dengan tahapan preliminary dan formative evaluation. Secara rinci, tahap formative evaluation dibagi lagi menjadi self evaluation, prototyping, dan field test yang dianalisis menggunakan analisis deskriptif. Hasil penelitian berupa seperangkat soal matematika bilingual berbasis mathematical literacy dengan konteks teknik mesin untuk mahasiswa politeknik yang memiliki kriteria valid, praktis dan mempunyai efek potensial. Soal yang dikembangkan sebanyak 23 butir soal dan dinyatakan valid berdasarkan penilaian validator dari aspek konten, konstruk, dan bahasa, kemudian memiliki kriteria praktis berdasarkan uji coba small group dan butir soal tersebut mempunyai efek potensial yang ditinjau dari analisis angket pada saat field test.
Tujuan dari penelitian ini adalah untuk melihat tingkat efektivitas dari penggunaan model blended learning dengan menggunakan platform LMS moodle terhadap Mathematical creative thinking di Politeknik. Subjek penelitian adalah mahasiswa jurusan teknik mesin, program studi teknik mesin dan manufaktur di Politeknik Manufaktur Negeri Bangka Belitung yang dipilih secara random. Pemilihan sampel kelas eksperimen dan kelas kontrol menggunakan teknik random sampling. Penelitian ini merupakan penelitian kuantitatif dengan metode Pre Eksperiment. Desain penelitian yang digunakan adalah One-Group-Pretest-Posttest dengan membandingkan hasil pretest dan posttest kepada mahasiswa pada satu kelas yang diterapkan pembelajaran dengan model Blended Learning menggunakan platform LMS Moodle. Instrumen yang digunakan adalah instrument tes untuk pretest-posttest. Analisis statistik uji-t untuk Mathematical creative thinking diperoleh nilai sig. 0.00 < 0,05 dan rata-rata nilai N-gain sebesar 0,57. Dari hasil analisis statistik tersebut, menunjukkan bahwa penerapan pembelajaran dengan model Blended Learning menggunakan platform LMS Moodle mempunyai efektivitas sedang dalam meningkatkan Mathematical creative thinking mahasiswa.
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