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.

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.

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.

STRENGTHENING TEACHER PEDAGOGICAL COMPETENCIES THROUGH THE USE OF DYNAMIC GEOMETRY SOFTWARE IN MATHEMATICS LEARNING. The selection of strategies, methods, models, and media of appropriate mathematics learning is a form of implementation of a teacher's pedagogical competence. In the 2013 curriculum, the teacher not only sets a scientific approach as a reference in implementing the learning process but also demands innovation to accommodate the right media as well. The role of instructional media, especially dynamic media, is very important in learning mathematics in both elementary and junior high schools. The media was used to explain abstract mathematical problems to be concrete, motivate students, stimulate student learning activities, and help the effectiveness of the learning process. Technological devices such as computers are one of the tools that can be used as dynamic mathematics learning media. Mathematical learning collaboration with ICT devices has been widely carried out in urban and rural areas in Indonesia. Dynamic Geometry Software (DGS) in the form of GeoGebra is a learning medium specifically developed to facilitate the learning of geometry, algebra, and calculus. Therefore, this community service activity (PkM) is intended to strengthen the teacher's pedagogical competence through the use of dynamic learning media using Dynamic Geometry Software (DGS) in the form of GeoGebra in mathematics learning in junior high schools. This PkM aims to train teachers to be able to operate or create mathematics learning media assisted by DGS, especially in learning geometry to students. By making their own, teachers can add insight and increase creativity in making learning media. The supported subjects in these community service activities were junior high school mathematics teachers in Ruteng City. As for the results obtained after the PKM activities, the teachers can operate and create mathematics learning media using DGS in the form of GeoGebra.

The numerical method is one method that can be used to solve differential equations, both differential equations that are easy or difficult to solve analytically. The solution obtained from the calculation results is an approximate solution or a solution that approaches an analytic solution, not an analytic solution. That is, in solving differential equations numerically, there is always an error. In this paper, an analytical solution is described and described and the application of different methods in solving a damped mass spring system with a known limit value. The error between the analytic and numerical solutions obtained is very small.