<div align="center"><table width="645" border="1" cellspacing="0" cellpadding="0"><tbody><tr><td valign="top" width="439"><p class="Abstrak"><strong>Abstract:</strong> An interactive multimedia-based digital module developed to improve students' mastery of concepts. This research uses research and development (R&D) methods with the ADDIE model. The ADDIE model consists of 5 stages, is analysis stage, design stage, development stage, implementation stage, and evaluation stage. Inferential statistical data analysis used paired sample t-test. The results of data analysis show that the value of t<sub>count </sub>= -32.879 > t<sub>table</sub> = 2.080, then there is an influence of digital modules on concept mastery. The feasibility of digital modules is 93.5% and practicality is 88.5%. The results showed that development of digital modules is feasible and practical to be applied in the learning process and had an effect on increasing students' mastery of concepts.</p><p class="Abstrak"><strong>Abstrak:</strong> Modul digital berbasis multimedia interaktif dikembangkan untuk meningkatkan penguasaan konsep. Penelitian ini menggunakan metode <em>Research and Development</em> (R&D) dengan model ADDIE. Model ADDIE terdiri dari 5 tahap yaitu tahap <em>analysis, </em>tahap<em> design, </em>tahap<em> development, </em>tahap<em> implementation, </em>dan tahap<em> evaluation</em>. Analisis data statistik inferensial menggunakan uji paired sample t-test. Hasil data analisis menunjukkan bahwa nilai t<sub>hitung</sub> = -32.879 > t<sub>tabel</sub>= 2.080, maka terdapat pengaruh modul digital terhadap penguasaan konsep. Kelayakan modul digital sebesar 93.5% dan kepraktisan sebesar 88.5%. Hasil penelitian menunjukkan bahwa pengembangan modul digital layak dan praktis diterapkan dalam proses pembelajaran serta berpengaruh terhadap peningkatan penguasaan konsep siswa.</p></td></tr></tbody></table></div>