Active learning is an instructional method that engages students in the learning process through activities and discussions in the classroom rather than passively listening to a lecture. It emphasizes higher-order thinking and often involves group work. Research shows that active learning techniques increase student performance on exams by about half a letter grade on average and decrease failure rates compared to traditional lecturing alone. Effective active learning strategies include peer instruction, interactive demonstrations, discussions, and predicting outcomes before viewing videos or demonstrations.