A simplified approach with FFT and smartphone in high school physics

This paper presents a simplified approach to introducing the Fast Fourier Transform (FFT) as a graphical tool in high school physics. By combining the use of smartphones, interactive Jupyter Notebooks, and widely available applications, the module supports the study of wave phenomena in both time and frequency domains. We describe the design and implementation of the intervention, outline the learning goals, detail the module structure, and report on the data collection methods and outcomes. In addition, we discuss practical observations and challenges, and we propose future improvements. Overall, the results show that students develop both conceptual understanding and technical skills.