The educational landscape has undergone a significant transformation in recent decades, driven by technological advancements, evolving pedagogical theories, and changing student needs. Among these innovations, the flipped classroom has emerged as a particularly impactful approach to teaching and learning. This chapter establishes the foundational elements of the flipped classroom model, examining its definition, historical development, and theoretical underpinnings. We will explore how this innovative approach differs from traditional instructional methods, analyze the research supporting its effectiveness, and identify the essential components required for successful implementation. By understanding these foundations, educators and researchers can better comprehend the potential of flipped instruction to enhance student learning outcomes and transform educational practices across diverse academic contexts.