The purpose of this study was to develop language learning media based on organic waste as an introduction to ecoliteracy for elementary school. This study uses a development research method that refers to the Borg and Gall development model. Data collection methods in this study were questionnaires and observations. Data analysis in this research is descriptive quantitative with categorization technique. Based on the results of the study, it showed that the final product of learning media development based on organic waste at SDN 3 Kabar after going through a series of development procedures, was feasible to be implemented. Based on the results of product trials that have been carried out, there are significant changes between the pretest and posttest on students' understanding of Ecoliteracy. The indicator “merasa dini bagian dari alam” when the pretest percentage of students who are able to understand is 29.6% and when the posttest is 63.0%. The percentage of indicator “mampu mendeskripsikan pengertian dan jenis sampah” from 14.8% become 63.0%. The last indicator is ”mampu mendeskripsikan dampak negative sampah” from a percentage of 0% increasing to 29.6%. This shows that the introduction of ecoliteracy through developing language learning media based on organic waste to students at SDN 3 Kabar was successful.Keyword: Language Learning Media Development, Organic Waste, Ecoliteracy

All economic operations disturbed by technological centers or traditional markets during the Covid-19 epidemic will benefit from the development of this information or information system capable of supporting business activities in every line of life. A vegetable trader's work entails selling items such as vegetables, meat, fish, and other items that are frequently sought after by the community to meet their daily dietary requirements. Traders have significant challenges due to the limited number of market visitors and the rapid decay of merchandise. The goal of this research is to create a mobile veggie application utilizing the React Native framework and the Waterfall approach to design Android-based applications that are simple to use. Customers can order via Whatsapp since it is simpler and easier to follow up, and the majority of customers must be familiar with Whatsapp. Customers can examine prices, types/categories, and place orders via the app, which is an android-based application. Keywords: Vegetable seller; Android; Waterfall Abstrak: Berkembangnya teknologi informasi atau sistem informasi saat ini telah mampu mendukung kegiatan bisnis pada setiap lini kehidupan hal tersebut menjadi faktor pembantu saat segala proses ekonomi terganggu oleh pembatasan kerumunan pada pusat perbelanjaan atau pasar tradisional selama masa pandemi Covid-19. Pedagang sayur adalah sebuah pekerjaan yang menjual barang dagangan seperti sayuran, daging, ikan, dan lain-lain yang dagangannya seringkali dicari oleh masyarakat untuk  memenuhi kebutuhan bahan pangan sehari – hari. Rendahnya jumlah pengunjung pasar dan cepat membusuknya bahan dagangan menjadi masalah besar bagi pedagang. Tujuan dari penelitian ini adalah membangun suatu aplikasi sayur mobile menggunakan framework React Native untuk mengembangkan aplikasi berbasis Android dengan menggunakan metode Waterfall, sehingga aplikasi yang dibangun mudah digunakan. Hasil dari penelitian ini adalah aplikasi berbasis android untuk memudahkan pedagang menambahkan data dagangan karena mayoritas sudah memiliki hp android, pelanggan bisa memesan melalui Whatsupp karena lebih simple dan mudah di follow up, mayoritas pelanggan pasti sudah familiar dengan Whatsupp, Customer bisa melihat harga, jenis/kategori melakukan pesanan via app. Kata kunci: Pedagang Sayur; Android; Waterfall.

Health is a primary need that must be met in people's lives. Health institutions in their services to improve effectiveness and efficiency in their services. With current technological developments, all information can be accessed with various types of devices, namely Android-based smartphones. Android applications, can make it easier for users who can use applications without space and time limits. This information system application can be a solution in data processing and can provide information about health and doctor consultations with patients or patients can search for the doctor's location practice. This application was built using the Java programming language for android with the development method using waterfalls. The results of this study are an Android-based information system application that helps the public in obtaining information, consulting doctors, finding doctors' locations, registering boldly to practice doctors and facilitating data processing