Penelitian ini bertujuan untuk mengembangkan video pembelajaran IPA SMP berbasis pendekatan kontekstual sesuai latar belakang siswa di kabupaten Manggarai. Penelitian ini menggunakan model pengembangan ADDIE (analyze, design, development, implementation, and evaluation). Tahapan yang akan dilakukan yaitu tahap analisis yang dilakukan meliputi: analisis pengetahuan atau kompetensi sasaran, karakteristik sasaran, dan peralatan yang menunjang penggunaan media; tahap perancangan yang dilakukan meliputi: pemindahan informasi dari fase analisis ke dalam bentuk dokumen yang menjadi tujuan dibuatnya video pembelajaran; tahap pengembangan yang dilakukan meliputi: kegiatan produksi atau mengembangkan video pembelajaran, inti dari kegiatan ini adalah pengambilan gambar berupa perekaman gambar dengan menggunakan kamera, dimana pengembangan video dilakukan menggunakan beberapa aplikasi yaitu videoscribe, photoshop, dan editor video;  tahap implementasi yang dilakukan meliputi video pembelajaran diterapkan pada siswa kelas VII SMP; dan tahap evaluasi meliputi kegiatan: penilaian media berdasarkan evaluasi formatif. Hasil penelitian pengembangan ini yaitu dihasilkannya video pembelajaran IPA SMP kelas VII berbasis pendekatan kontekstual Manggarai yang bisa digunakan guru dalam proses pembelajaran untuk membantu siswa di Manggarai memahami konsep materi berdasarkan hasil validasi ahli materi sebesar 92,5% dan ahli media sebesar 96% serta hasil uji coba pada kelompok kecil yaitu kelayakan isi sebesar 93,33%, penyajian sebesar 93,89%, dan bahasa sebesar 94,28%. Dengan demikian, video pembelajaran ini bisa digunakan siswa untuk membantu proses belajarnya dari rumah sehingga dengan mudah memahami konsep IPA dasar.

This research aimed to examine the effect of collaboration Think Pair Share (TPS) Leaning Model and m-Learning based on Android on the understanding of trigonometry concepts and to investigate the interaction between collaborative learning and cognitive style on the understanding of trigonometry concepts. This research involved 80 pre-service teachers of Mathematics Department at STKIP Santu Paulus Ruteng, Province of East Nusa Tenggara, Indonesia. The quasiexperimental research with control class without pre-test was done. Before the experiment, the Group Embedded Figures Test (GEFT) was used to identify students cognitive styles either Field-Dependent (FD) or Field-Independent (FI). The research data were obtained from a test consisting of five questions to measure students' understanding of trigonometry concepts. The data were then analyzed using two-way ANOVA. The results of the research show that 1) the collaboration of TPS Leaning Model and m-Learning based on Android leads to the higher achievement of the students on the understanding of trigonometry concepts if compared to students in conventional groups (expository). 2) there was no interaction effect between the collaborative learning and cognitive style of students' understanding of trigonometry concepts.

Hundreds of studies have been found in the literature on mathematics learning supported by the use of the computer algebra system (CAS). However, there are numerous reports with mixed and even contradictory findings. This has the potential to lead to errors in concluding. This meta-analysis study was conducted to test the overall effect size (ES) of CAS-based mathematics learning. This study also aims to analyze the level of variation in individual studies and consider its implications. The ERIC, SAGE, SpringerLink, and Google Scholar databases were examined to achieve relevant research. The search results found 136 related journal articles published between 2010 and 2020. As per the study protocol, 31 articles were eligible, and 36 ES were analyzed. The calculation tool is Comprehensive Meta-Analysis (CMA) software, and the Hedges-g equation is used based on the random-effect model. The analysis results revealed that overall the use of CAS ES had a large positive impact on students’ mathematical abilities (ES = 0.89; standard error 0.08). Moderator analysis shows that CAS’s use is more effective, considering the difference in education level and CAS type. The research implications are discussed and provide important information as a fundamental idea for further meta-analysis studies on CAS’s effects.

This study aims to determine the difference of the mathematical communication skills improvement of students who obtained mathematical learning by problem-solving of scientific approach and Number Head Together (NHT) of cooperative learning and the students who obtained mathematical learning through the use of problem-solving approach only. This research is a quasi-experimental study with nonequivalent control group design. The population of this study was 274 students of 8th-grade who were distributed to seven classes. The samples taken were two classes, each of which consisted of 41 students for the experimental class and 42 students for the control class. The data were analyzed to compare students' mathematical communication skills using descriptive statistics and inferential statistics t-test. The result of this research showed that the mathematical communication skills improvement through the application of problem-solving of scientific approach and NHT of cooperative learning was higher than the mathematical communication skills of students who used a problem-solving approach only.

Constructing representations in the form of visualization can help students connect with problem situations and facilitate students' ability to communicate their understanding of the problem. This implies the ability to translate mathematical concepts. This research is a descriptive study that aims to describe the ability to translate trigonometric ideas from verbal forms to visual forms of students. This research was conducted at mathematics education of STKIP Santu Paulus Ruteng which involved 75 first-level students as a sample. The results of this study indicate that the students' at the mathematics education department of STKIP Santu Paulus Ruteng, especially in the new semester, were mostly still capable of teaching the translation of trigonometric concepts from verbal to visual forms, some of which were at the PU level with a percentage of 36 %. In the second level, 30.6% is in the PUSM, SU category, 17.4%, NU is 13.3% and SM is 2.6%. The results of this research can be used as references for high school teachers to find out their graduation profile in terms of translational skills and also input for lecturers to be able to adjust the lecture process based on the characteristics that have been produced.

Tujuan penelitian ini adalah untuk mendeskripsikan kesesuaian buku teks Kemendikbud Matematika kelas VIII edisi revisi 2017 dengan Kurikulum 2013 dilihat dari Standar Isi yang meliputi aspek cakupan materi, Kompetisi Dasar, keluasan materi, kedalaman materi, dan keakuratan materi. Penelitian ini merupakan penelitian kualitatif dengan teknik analisis konten. Objek penelitian ini adalah materi buku yang terdapat dalam buku teks Matematika SMP kelas VIII edisi revisi 2017 yang diterbitkan oleh Puskurbuk. Data dianalisis dengan menggunakan instrumen yang telah divalidasi. Teknik analisis data dilakukan dengan tahap pendefinisian unit, penentuan sampel, pencatatan, pereduksian data, penarikan kesimpulan, dan penarasian. Hasil penelitian menunjukkan bahwa kesesuaian materi dalam buku dengan Standar Isi pada Kurikulum 2013 dilihat dari cakupan materi adalah sebesar 100%, Kesesuaian KD dalam buku dengan KD pada Kurikulum 2013 adalah sebesar 100%. Kesesuaian keluasan materi dalam buku dengan keluasan materi dalam Kurikulum 2013 adalah sebesar 98%. Tidak terdapat bahasan materi beserta contoh yang berkaitan dengan cara menentukan kuartil data ganda pada pokok bahasan Statistika. Kesesuaian kedalaman materi dalam buku dengan kedalaman materi dalam Kurikulum 2013 adalah sebesar 100%. Sedangkan keakuratan materi dalam buku adalah sebesar 88%. Terdapat beberapa ketidakakuratan materi dalam buku, seperti ketidaksesuaian contoh yang berkaitan dengan fungsi dan bukan fungsi, kesalahan operasi aljabar pada alternatif penyelesaian masalah dari contoh soal relasi dan fungsi, ketidakakuratan dalam penulisan persamaan pada alternatif jawaban pokok bahasan Sistem Persamaan Linear Dua Variabel, ketidakakuratan Pengertian lingkaran dan Statistika, dan ketidaksesuaian dalam penyajian contoh Prisma segidelapan. Hal ini kurang sesuai dengan implementasi Kurikulum 2013 yang terdapat dalam buku tersebut.

Kalkulus integral merupakan salah satu mata kuliah matematika yang memerlukan tingkat penalaran, kemampuan komunikasi serta kemampuan berpikir tingkat tinggi yang memadai untuk dapat memahami dan menyelesaikan soal. Oleh karena itu, banyak mahasiswa mengalami kesulitan saat mempelajarinya sehingga melakukan banyak kesalahan saat memecahkan masalah. Tujuan penelitian ini adalah untuk mengidentifikasi kesalahan mahasiswa berdasarkan Newman’s Error Analysis (NEA) dalam menyelesaikan soal kalkulus integral disertai dengan pemberian scaffolding. Subjek penelitian adalah mahasiswa Program Studi Pendidikan Matematika Unika Santu Paulus yang mengikuti perkuliahan kalkulus integral. Teknik pengumpulan data menggunakan tes dan wawancara tidak terstruktur. Analisis data dilakukan dengan cara mereduksi data, menyajikan data dan menarik kesimpulan. Hasil penelitian menunjukkan bahwa tidak ada kesalahan yang dilakukan mahasiswa pada tipe indikator 1 (reading error), mahasiswa rata-rata melakukan kesalahan pada indikator 2 (comprehension error) sebesar 39%, rata-rata kesalahan pada indikator 3 (transformation error) sebesar 71%, rata-rata kesalahan pada indikator 4 (process skills error) sebesar 76% dan rata-rata kesalahan yang paling banyak dilakukan pada indikator 5 (encoding error) sebesar 87%.  Scaffolding yang digunakan untuk mengatasi semua kesalahan mahasiswa hanya sampai pada scaffolding level 2 yaitu explaining, reviewing, dan restructuring. Pemberian scaffolding yang dilakukan dosen bersifat menjelaskan, meninjau dan merestrukturisasi sehingga mendorong mahasiswa untuk memperbaiki kesalahan-kesalahan tersebut. Bertolak dari hasil penelitian ini, maka dosen diharapkan untuk melakukan kegiatan perkuliahan yang bermakna bagi mahasiswa sehingga tidak mudah untuk melupakan konsep-konsep materi yang telah dijelaskan.

Currently, the government is aggressively optimizing students' literacy skills, including mathematical literacy skills. Today's problem is that the dominant students still have low mathematical literacy skills. Therefore, one solution is to apply a Problem Based Learning (PBL) model based on portfolio assessment. This study aims to determine the difference between students' mathematical literacy skills taught using the PBL learning model about portfolios and students' mathematical literacy skills using the direct learning model. Quasi-experimentation is the type of research using the Posttest Only Control Group Design. The population of the study was the seventh-grade students of SMPN 2 Cibal, who found 96 people spread over 3 classes. Samples were taken from the population in a randomized manner so that 32 students of class VIIC were obtained as the experimental group and 32 students of class VIIA as the control group. Data was collected from description testing and also equipped with student portfolio assessment results. The results of data analysis showed that the literacy skills of students who were taught using the PBL learning model showed a better portfolio than the literacy skills of students who used the direct learning model.