Along with the development of technology both directly and indirectly can change someone in communicating, socializing and learning, this is a challenge for lecturers to be able to use technology optimally and to facilitate interaction with students in teaching and learning both in class and outside the classroom so that indicators in the unit of lecture events and semester learning design can be achieved. Edmodo is a social network platform for lecturers and students to share ideas, files, agenda of activities and assignments. Edmodo is designed to create lecturer and student interactions that emphasize fast communication, polling, assignments, sharing ideas, and much more. The research aims: 1) to find out whether mathematics learning using Edmodo (experimental) is better than learning without using Edmodo (conventional) on mathematical communication; 2) to find out whether students who study using Edmodo are positive towards learning mathematics. Quantitative research with quasi-experiment method, the research design used is nonequivalent control group design: providing two different treatments to two groups, namely the experimental class (Edmodo) and the control class (conventional). Quantitative data collection and analysis techniques using normality test, homogeneity test, two average similarity test, and t test. The results of the study are: 1). Learning using edmodo is better with learning without using edmodo with mathematical communication skills. 2). Students who learn to use edmodo have a positive attitude towards learning mathematics. The implication of the research is for the next researcher, using edmodo media so that maximum control is needed on students. If further research is conducted with different samples, the results shown will also be different. This can be viewed from a variety of different characteristics of students that greatly affect the ability of mathematical communication.

Perkembangan teknologi yang sangat canggih pada jaringan komputer yang menyediakan layanan informasi secara luas merupakan kemajuan dalam bidang teknologi komunikasi yaitu internet (international networking) memiliki manfaat yang sangat besar. Pencegahan musibah Covid 19 ini berdampak pada masyarakat melaksanakan Lockdown. Hal ini didasarkan pada Surat Edaran dari Menteri Pendidikan dan Kebudayaan Nomor: 36962/MPK.A/HK/2020 tertanggal 17 Maret 2020 tentang “Pembelajaran secara Daring dan Bekerja dari Rumah dalam rangka Pencegahan Penyebaran Corona Virus Disease (Covid-19)”. Dengan pembelajaran secara daring maka Univesitas Quality melaksanakan pembelajaran dengan meggunakan aplikasi dari internet yaitu Google Classroom. Penelitian yang digunakan merupakan jenis penelitian kualitatif dengan metode deskriptif. Teknik pengumpulan datanya diperoleh dari wawacara, dokumentasi dan kueseoner (angket). Prosedur penelitiannya dilakukan secara online. Hal ini dikarenakan Lockdown. Hipotesis sementara yakni pembelajaran menggunakan Google Classroom pada Universitas Quality berjalan secara efektif selama musibah Covid 19. Hasil dari penelitian ini menunjukkan bahwa rata-rata dari semua kelas adalah 100,45 dan dari nilai keseluruhan diperoleh rata-rata 3,35 berdasarkan table dengan kriteria cukup, sehingga pengguna google classroom menurut mahasiswa dirasa cukup membantu proses pembelajaran. Skor tertinggi kelas 2A21 126 dan skor terendah 80 sedangkan kelas 2A22 skor tertinggi 121 dan skor terendah 84, dengan rata-rata kelas 2A21 101,58 dan kelas 2A22 101,21.

Along with the rapid development of the times, all aspects of life also changed. This is a challenge for educators to be able to use technology optimally and can facilitate interaction with students in the learning process, one of which is Edmodo. Edmodo is a social learning platform for teachers / lecturers and students / students that provides several features to support e-learning such as assignments, quizzes, assessments, etc. Through edmodo teachers and students can share notes and documents and can share discussions online. This study aims to describe the use of edmodo in analytic geometry learning in 5th semester students of the Mathematics Education study program at Quality University, Medan. This research is a qualitative research. Qualitative research is said because it is descriptive and tends to use analysis of research subjects that are highlighted. Analysis techniques used are reduction, presentation, and verification and conclusion. Validation using triangulation (combined). Reduction namely that has been obtained is reduced so that it gives a clearer picture and makes it easier for researchers to collect. Presentation is done in the form of brief description. Verification and drawing conclusions are new findings that have never before existed.

Tujuan dari penelitian ini adalah mengetahui tingkat kemampuan komunikasi matematis siswa pada pembelajaran yang dianalisis melalui lembar jawaban siswa, mengetahui kesalahan yang sering dilakukan oleh siswa dan yang menjadi penyebab siswa melakukan kesalahan. Teknik pengumpulan data memberikan soal tes komunikasi matematis siswa    untuk mengumpulkan informasi dari hasil tes. Subjek pada penelitian ini adalah siswa/i kelas VIII SMP Negeri 1 Paranginan. Adapun alat pengumpulan data yang digunakan adalah pemberian tes yang diberikan berupa tes kemampuan matematis sebanyak 3 soal. Metode penelitian ini adalah deskriptif kualitatif dan instrumen yang digunakan terdiri dari tes kemampuan komunikasi matematis dan wawancara. Hasil penelitian ini yaitu:1) Kemampuan menghubungkan benda nyata ke dalam ide-ide matematika sebesar 34%. Pada penelitian ini peserta didik dapat menuliskan informasi yang diketahui dan ditanyakan atau tujuan dari permasalahan, 2) Kemampuan menyatakan peristiwa sehari-hari dengan simbol-simbol matematika dalam menyajikan ide-ide matematik secara tertulis sebesar 25%. Pada penelitian ini peserta didik dapat menggunakan simbol-simbol matematika saat menuliskan informasi yang diperoleh dari soal dan saat menyelesaikan permasalahan, 3) Kemampuan menjelaskan ide, situasi sehari-hari dan relasi matematik, secara tertulis maupun dengan gambar sebesar 30%.. Kesalahan yang sering dilakukan siswa dalam penelitian ini adalah kesalahan konsep, kesalahan operasi, dan kurang teliti. Adapun yang menjadi penyebab siswa melakukan kesalahan adalah karena faktor lupa, kurang teliti, kesulitan dalam belajar dan waktu belajar dirumah yang kurang.

This study aims to determine: Is increasing the ability of mathematical problem solving students who get problem based learning better than students who get conventional learning. This research is a semi-experimental study with the study population as all students of all grade X students of SMK AR-Rahman Medan. The sample selection is done randomly and 2 classes are chosen. The instrument used is a test of problem solving skills with the material system of linear equations. Data in this study were analyzed using parametric analysis. Statistical analysis of data was performed by t test analysis. The results showed that: (1) Increased mathematical problem solving abilities of students who obtained problem-based learning were higher than students who obtained conventional learning; (2) There is a significant difference between improving students' mathematical problem solving abilities that obtain problem-based learning and students who obtain conventional learning; (3) Among the four aspects of problem solving, the highest average increase in the aspect of "making a mathematical model" of 0.635 with moderate criteria. Based on the results of this study, researchers suggest that problem-based learning in students can be used as an alternative for teachers to improve students' problem solving abilities, especially in the Linear Equation System material