In many secondary schools, students face limited access to music technology tools, such as computers, which restricts their opportunities to interact with music composition software. However, nearly all students possess smartphones with internet access, offering an alternative means to integrate technology into the classroom. This article explores the use of Chrome Music Lab as a tool to enhance music composition skills among 9th-grade students. By incorporating Orff's elemental music style and leveraging the TPACK framework, this study provides a structured approach to teaching music composition in a way that reduces the intimidation factor and fosters creativity. This paper presents the conceptual framework, teaching plan, TPACK-based teaching model, and examples of student work.