This research is a learning device development research that will be used in learning with the Project based Learning (PjBL) model with the help of technology, in this case using Geogebra software. Geogebra Software is a dynamic mathematical software that combines geometry, algebra and calculus can be used as a tool in mathematical learning. Geogebra is a special mathematical program that can be used as a medium for learning mathematics. This research was conducted in one of the high schools in Deli Serdang Regency. Development of learning is done gradually in accordance with step 4D, then the researchers simplify the changing of the four stages (4D) into three stages (3D) is defining, designing, and development.Abstrak. Penelitian ini merupakan penelitian pengembangan perangkat pembelajaran yang akan digunakan dalam pembelajaran dengan model Projectbased Learning (PjBL) dengan bantuan teknologi, dalam hal ini menggunakan software Geogebra. Software Geogebra adalah software matematika dinamis yang menggabungkan geometri, aljabar, dan kalkulus dapat digunakan sebagai alat bantu dalam pembalajaran matematika. Geogebra merupakan program khusus matematika yang dapat digunakan sebagai media pembelajaran matematika. Penelitian ini dilakukan di salah satu sekolah menengah atas di Kabupaten Deli Serdang. Pengembangan pembelajaran dilakukan bertahap sesuai dengan langkah 4D, yang kemudian para peneliti menyederhanakan dengan mengubah dari empat tahap (4D) menjadi tiga tahap (3D) yaitu pendefinisian, perancangan, dan pengembangan.

In this modern era, information technology is very influential in many ways, especially in the business and business world. Computer is a device that is needed for data processing, so the data processed can be effectively and efficiently to provide information needed by individuals, companies, and agencies. Clustering is a method for finding and grouping data that has similarity between one data and others. In the clustering algorithm, data will be grouped into clusters based on the similarity of one data to another. The principle of clustering is to maximize the similarity between members of one cluster and minimize similarities between different cluster members. The most well-known category of clustering algorithms is Hierarchical Clustering. As well as PLN (State Electricity Company), where PLN is a state-owned enterprise (BUMN) that provides electricity services to all communities and all circles, both private and business entities whose job it is to serve users in electricity. Services will be maximized and can be accessed by all parties if in the service there is a role for the media as a assistant in conveying information to all circles. This information will be right on the target if the information is processed from a reliable source. PT PLN (Persero) Krueng Geukuh did not yet have a load data collection system that makes staff still did data collection by manual methods. The result of this study shows the system of 2 hour load cluster data grouping using hierarchical clustering of PT PLN (Persero) Krueng Geukuh is an effective solution to help staff record computerized loads and can increasing the work performance in data collection. Designing systems of Grouping Data Load 2 Hours Substation Using Hierarchical Clustering PT PLN (persero) Krueng Geukuh was built by using PHP so it has a more attractive appearance and uses a MySQL database so that load managers become more effective.

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Penelitian ini membahas tentang pengembangan model pembelajaran saintifikberbantuan alat peraga paparaga baret untuk meningkatkan minat belajar siswa. Penelitian ini bertujuan untuk mengembangkan model pembelajaran saintifik berbantuan alat peraga papan ular tangga pada materi barisan dan deret aritmatika. Alat peraga yang dikembangkan memenuhi kriteria kevalidan, kepraktisan dan keefektifan media menggunakan model pembelajaran saintifik dapat meningkatkan minat belajar siswa dalam pembelajaran pada siswa kelas X. Penelitian ini merupakan penelitian pengembangan (Research and Development) yaitu pengembangan model pembelajaran saintifik berbantuan alat peraga papan ular tangga. Penelitian ini menggunakan model pengembangan 4d yang dikembangkan oleh S. Thiagarajan, tetapi peneliti hanya menggunakan 3 langkah pengembangan yaitu (define, design, development). Tekhnik pengumpulan data yang digunakan dalam penelitian adalah metode angket dan soal pretest, posttest.  Penelitian ini menghasilkan alat peraga berupa papan ular tangga barisan dan deret aritmatika. Hasil analisis tingkat kelayakan pada papan ular tangga barisan dan deret menunjukkan bahwa (1) Uji validitas dari ke 4 ahli menunjukkan rata-rata 79,07% sehingga alat peraga berupa paparaga baret masuk kedalam kategori valid. (2) Uji kepraktisan dilihat dari angket respon siswa dinyatakan sangat praktis dengan rata-rata 84,92%. (3) Uji keefektifan dinyatakan sangat efektif dilihat dari uji soal pretest dan posttes dengan nilai rata-rata 82,46% siswa yang tuntas. Sedangkan pada angket respon terhadap media untuk meningkatkan minat belajar siswa nilai rata-rata 55,94% menunjukkan bahwa minat belajar siswa tinggi. Dari ketiga uji dan respon terhadap media untuk meningkatkan minat yang telah dilakukan maka dapat disimpulkan bahwa paparaga baret layak digunakan sebagai media pembelajaran

This community service activity program aims to improve the skills of teachers in making learning media during the pandemic at SMAN 1 Rantau Utara. The method used is descriptive method. The steps used are by providing socialization, lectures and assistance in the process of making learning media during the pandemic. The results of the response of the training participants gave a positive response. Participants gave suggestions in this activity to continue in self-development for teachers at SMAN Rantau Utara.