The purpose of this community service is to train junior high school mathematics teachers to be able to utilize GeoGebra in visualizing the construction of flat shape area formula. The program carried out in collaboration with IndoMS DIY-Central Java. The method used in this community service is an online workshop. The result of this workshop is that the participants are able to visualize the construction of flat shape area formula for a triangular and parallelogram.

Naturies Indonesia is one of the UMKM for spice drinks in Macanan, Klaten, Central Java which is developing. As one of the growing UMKM, Naturies Indonesia is experiencing problems related to the distribution of its products. Naturies Indonesia has incurred transportation costs of Rp.442,100.00 per week in distributing its products to 5 distributors (Kudus, Jakarta, Shopee, Bandung, and offline). Due to human resource constraints, Naturies Indonesia does not yet have a thorough plan to reduce shipping costs in allocating products from production sites to customers or distributors. Through this applied research, this research aims to find the optimization of product delivery costs. Data were collected through interviews and documentation, then analyzed using the Northwest Corner and Vogel's Approximation methods. Analysis using the Northwest Corner method found a shipping cost of IDR 431,600.00, while the Vogel's Approximation method found a shipping cost of IDR 427,900.00. The shipping costs found were actually lower than the financing that had been issued so far.  Keyword: northwest cor, spice drinks, optimization of transportation, UMKM Naturies Indonesia, vogel’s approximation

Guru masih mengalami kendala dalam membuat video pembelajaran terkait dengan kemahiran, bahasa dan ketidaksesuain antara objek video dengan karakteristik peserta didik. Calon guru matematika perlu disiapkan untuk dapat membuat video pembelajaran yang sesuai dengan karakteristik materi, peserta didik serta sesuai dengan tututan di era digital. Tujuan penelitian ini adalah untuk menganalisis kendala calon guru matematika dalam pembuatan video pembelajaran. Penelitian ini termasuk studi kasus yang berfokus pada analisis kendala calon guru matematika dalam pembuatan video pembelajaran ditinjau dari aspek isi, aspek penyajian, aspek bahasa, dan aspek grafika. Subjek penelitian diambil dari 14 mahasiswa yang telah menempuh kuliah Inovasi Pembelajaran pada Program Studi Pendidikan Matematika, Universitas Widya Dharma Klaten. Pada penelitian ini menggunakan tiga metode pengambilan data yang meliputi dokumentasi, observasi dan wawancara. Penelitian ini menggunakan instrumen utama peneliti sendiri yang mengambil data penelitian serta instrumen bantu dalam bentuk lembar observasi dan pedoman wawancara. Penelitian ini menggunakan teknik triangulasi yang membandingkan data hasil observasi terhadap video pembelajaran dengan hasil wawancara sehingga didapatkan data yang valid. Hasil dari penelitian ini adalah kendala yang dialami oleh calon guru matematika dalam membuat video pembelajaran matematika terletak pada indikator ketepatan isi materi, konstruksi konsep atau rumus matematika, kelengkapan informasi, kejelasan suara, dan kesesuaian antara ilustrasi dengan materi.

This study aimed to determine the application of the integer program in optimizing the production of the convection sector. Integer linear programming is a special form of linear programming in which the decision variable solutions are integers. Ayyumnah store as one part of the convection sectors with a home-scale does not have an appropriate strategy to optimize profits with limited materials owned. The method used in this study is an integer program with the branch and bound method. The result of this research is the optimal amount of production of long shirts and tunics at the Ayyumnah Store with maximum profit.