Indonesian has a long historical journey as a means of communication as well as a symbol of national identity. This study discusses the dynamics of the development and position of Indonesian using the library research method. Library research used in this study can be in the form of books, articles and journals, which are based on various historical references and academic studies. Originating from the Malay language which has long functioned as a lingua franca in the Nusantara region, Indonesian was then inaugurated as a unifying language through the Youth Pledge in 1928 and was confirmed in the 1945 Constitution as the state language. The discussion also covers the important role of Indonesian in various sectors, such as the world of education, government bureaucracy, mass media, and the realm of technology. Based on the results of the literature review, it can be concluded that Indonesian plays a role not only as a means of communication, but also as an important element in the formation of national identity and the integration of a pluralistic society. This study emphasizes that the existence and function of Indonesian continue to develop in line with social change and progress.

Penelitian pengembangan ini dilatarbelakangi oleh rendahnya tingkat pemahaman karir pada siswa sekolah dasar yang disebabkan karena kurangnya bahan ajar mengenai informasi karir serta kurangnya ketertarikan siswa terhadap media yang diberikan oleh guru. Berdasarkan permasalahan tersebut, peneliti mengembangkan media yang berkaitan dengan informasi karir yaitu Pop-up Scrapbook Career. Media yang dikembangkan bertujuan untuk meningkatkan pemahaman karir siswa sehingga tercapainya tugas perkembangan siswa sekolah dasar pada tahap pertumbuhan karir fase fantasi yaitu kesadaran karir. Metode penelitian yang dilakukan menggunakan metode penelitian dan pengembangan (research and development) dengan model ADDIE (analysis, design, development, implementation and evaluation). Hasil penelitian yang diperoleh mengenai gambaran pemahaman karir pada siswa kelas v (lima) SDN Cipocok Jaya 2 kategori tinggi sebesar 58%, kategori sedang sebesar 21% dan kategori rendah sebesar 21%. Kemudian hasil uji kelayakan media sebesar 98% dan dikategorikan sangat layak. Hal tersebut dapat dikatakan bahwa media Pop-up Scrapbook Career layak digunakan untuk meningkatkan pemahaman karir siswa. Setelah media dinyatakan layak, kemudian dilakukannya uji coba dengan skala terbatas  pada peserta didik. Hasil uji coba terbatas memperoleh hasil N-Gain Score sebesar 57% dengan kategori cukup efektif.