Active learning promotes direct cognitive engagement over passive listening, focusing on problem-solving and collaboration. Key principles include cognitive work where students analyze their thinking, the shift of the instructor's role to facilitator, and real-world applications of concepts. Common strategies involve Think-Pair-Share, quick reflections, problem-based learning, and peer teaching. Benefits include higher retention of information, improved academic outcomes, readiness for professional environments, and immediate feedback for timely adjustments in teaching.