STEM是融合科学、技术、工程和数学等多学科知识的教育理念，强调跨学科学习，注重培养学生的创新思维和实践能力。物理是一门以实验为基础的学科，适合用来实践STEM教育理念。尝试在STEM教育理念的指导下，将科学、技术、数学和工程思想融入到重力小车的设计与制作中，对重力小车进行改进，在小车中加装了小型发电机，不仅能够演示重力势能转换为动能，还能够演示重力势能转换为电能.通过跨学科实践项目的探索，有助于学生从更多视角认识不同学科间的联系.

STEM is an educational concept that integrates multidisciplinary knowledge such as science, technology, engineering and mathematics, emphasizes interdisciplinary learning, and focuses on cultivating students′ innovative thinking and practical ability. Physics is an experiment-based discipline suitable for implementing STEM educational concepts. Under the guidance of STEM education concepts, we try to integrate science, technology, mathematics and engineering ideas into the design and production of the gravity car, improve the gravity car, and install a small generator in the car, which can not only demonstrate the conversion of gravity potential energy into kinetic energy, but also demonstrate the conversion of gravity potential energy into electrical energy. Through the exploration of interdisciplinary practical projects, students can understand the links between different disciplines from more perspectives.