Microteaching is a technique used to train teachers by having them teach short lessons to small groups of students. It allows trainees to focus on practicing and improving specific teaching skills. The process involves selecting a skill to practice, teaching a short lesson to peers while being recorded, receiving feedback, reteaching with adjustments based on the feedback, and repeating until the skill is mastered. By scaling down the class size, lesson length, and topic, microteaching provides trainees an opportunity to experiment with their teaching and quickly incorporate suggestions for improvement.