Key concepts are fundamental ideas or principles that form the foundation of a subject or field of study. They help to organize knowledge and provide a framework for understanding complex topics. For example, in science, key concepts might include theory, hypothesis, and experiment, which guide researchers in their investigations. In education, key concepts are essential for effective learning. They enable students to grasp the main ideas and connect new information to what they already know. Examples include critical thinking, problem-solving, and collaboration, which are vital skills for academic and real-world success.