Transforming everyday energy language into system-based reasoning: a conceptual teaching sequence for energy conservation

Abstract Energy conservation is often introduced as a central principle in physics, yet many students still explain energy phenomena using everyday expressions such as energy is used up, energy disappears, or energy flows away. These expressions are not only linguistic habits. They can shape how students reason about physical systems. This article proposes a classroom-ready conceptual teaching sequence designed to guide students from everyday energy language toward system-based reasoning. The sequence begins with students’ intuitive explanations, then guides them to identify system boundaries, track energy transfer and transformation, and revise their explanations using more coherent scientific language. Three familiar contexts are used: a battery-light circuit, a falling object, and a cooling cup of hot water. The article argues that energy conservation becomes more meaningful when students learn to reason about systems before they manipulate equations. The proposed sequence offers physics teachers a practical way to address conceptual confusion about energy while keeping mathematical demands low.